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Dear O.P.  
You are not mentally unwell.  You're experiencing normal confusion and temptation from the devil because you've clearly moved over to the right side!   Medications are of little benefit except as in the case of organic brain disease or a true emergency, such as one who shows up at a facility and is suicidal or dangerous to himself or others.  If you can write, this is not you!  It doesn't negate how you FEEL, but realize it's a temptation and a test, both of which are temporary.
If you can, look up the rules of St. Ignatius for making decisions according to the various states of one's soul.  In general, make no major change when you are unsettled.  Go to your classes, pray to hear God's Word in what you are taught.  Do your assignments.  Pray the Rosary daily, in a chapel, if possible.  If you are in Washington D.C., go downstairs in the crypt chapel, or pray, if you can, outdoors at the Franciscan Monastery.  Is there any way you can get to Mass in Vienna, VA?  It's right off the Beltway near Dulles.  Fr. Ringrose is a good resource.  I believe there is also an SSPX chapel in the area.  Unfortunately, you will find some discord among traditional Catholics, but don't allow that to deter you from seeking God.  (If you aren't in D.C. area, please ignore!)  
Get into a routine.  That will help very much with feelings of despair or anxiety. Don't be alone all the time.  If you can't find fellow traditional friends right away, do something on a casual basis, have coffee, watch anow outdoor sports event, go for a walk or to a museum.  Have patience with yourself. If God is for you, who can come against you?  
I will keep you in my prayers!

OP here. Thank you very much, Seraphina, for the prayers and advice! I don't live in D.C. You're right. This whole thing feels like a period of purification/temptation. Thanks be to God, I've found some other Catholics on campus, and we'll be praying together tomorrow.  I'll pray for you too!

OP here. Today was much worse and a little better.

 Had a class in which we had to read from an "Ecuмenical" Bible, the New Oxford Edition to be specific. The teacher taught us the false docuмentarian lies (That Moses didn't write the first five books) and used derogatory language for God. Some of this included the typical atheistic drivel about how "mean" God was in the OT. People today can't understand that in order for God to be merciful, he must be just. Really put me in a bad mood. Seeing my classmates fall for it made it even worse.
 She also taught us that people didn't take Genesis literally until modern times .  I stood up at least twice in class, saying that Abraham didn't lie about Sarah and how Abraham had compassion for the sodomites. Also spoke about how it wasn't cruel for God to ask Abraham to sacrifice Issac, as it was a foretelling that Christ would be crucified. Felt good about that. I thank the Holy Ghost and my Guardian Angel for helping me to speak up. 

Told my parents about this, they want me to talk to my professor about it privately. Is this a good idea? 

My parents still don't want me to drop out. They say I will have to put up with these types of people in the world, which is true. But why should I be subjected to going to a place where they seemingly have free reign to teach me their nonsense? It doesn't make sense. 

Also, does anyone know any good Biblical Apologetics site apart from the Kolbe Center? 

I thank you all again for your prayers. I'll pray for all you. 

I feel like sharing my experience will help you. I am in a public university not a "Catholic" one so my problems can be slightly different but I found that spending all the time locked in my room which is outside of campus either reading / studying or praying helped me get through the 5 days of the week I am here. This place is like sodom and gomorrah I never found one single catholic not even novus ordus, everyday I see drunkeness and depraved customs of these students. Usually at night I go for a walk to relax my thoughts, meditate and talk to God. The first weeks will be very dificult I wont lie but one has to carry his own cross and with the help of almighty God later find eternal rest.