I do my nails every week, get my hair done every six weeks, wear make-up, lotion, perfume and everything is great. I found around week 18 that self care goes a long way in relaxing and feeling great:)
I'm not an overly cautious person to begin with but at my 25 week apt today my Dr said, "she looks perfect," so I guess I'm doing something right:)
Congratulations on your pregnancy!
Those are all fine, I'm sure. If you want to be really careful, do your nails outside where you don't breathe it in. Scented lotions are fine unless you are using them on your lady parts lol but raw coconut oil is a great and more effective alternative to lotions with chemicals and its also edible as well as better at preventing stretchmarks and keeping weight gain down (weight gain only if you eat some as well though). Light make up is perfectly safe as long as you aren't super sensitive and think you might have an allergic reaction or something (: