Often times, when these types of modern issues arise (e.g., swimming, makeup, modesty, women wearing men's attire, women in the workplace, NFP, etc.), regardless of what is said online, I think back to the Dessert Fathers and the ascetics, and I thank my guardian angel for looking out for me, and calling me back to sentire cum ecclesia.
FYI, here is my position on the issues you brought up:
swimming - not necessary; if done in public, men/women must have their thighs covered (shorts) and not show off their back, belly, chest, or underarms. In short, modesty. If modest swimsuits aren't available, either do without swimming (it's not necessary for life) or throw on a T-shirt and/or mens pair of shorts (knee length) over your regular one-piece swimsuit.
makeup - women shouldn't wear makeup. It's fake, expensive, full of chemicals, vanity, and it literally stinks!
Natural beauty and interior beauty are the ONLY kinds of beauty.
modesty - Marylike standards of dress (someone posted the details above).
women wearing men's attire - no shorts, slacks, or pants for women. Skirts/ dresses only, and they must be a couple inches below the knee minimum
. Preferably ankle-length.
women in the workplace - women shouldn't have male co-workers. They might have to "work with men" to a lesser degree, but they shouldn't be elbow-to-elbow with them all day, doing the exact same job, if you know what I mean. Single women, to earn a living, should stick to feminine jobs like teaching (children), nursing, childcare, secretarial, bookkeeping, etc. They shouldn't be in authority over men, and they shouldn't be in dangerous "mens" jobs at all. No police officers, soldiers, firefighters, oil rig workers, etc.
NFP - I don't usually get into this fight personally, but even if it were acceptable to use the Rhythm method in certain circumstances, I would point out that "economic difficulty" is highly overestimated by most. If you give up the American Dream i.e., the suburban middle class lifestyle, you'd be surprised how many children you can afford. Especially when you refrain from worldliness, engage in a bit of self-mortification and frugality, and learn some discipline. It can be done.