Too Much Medications??

Hello Everyone! I am 18 weeks pregnant and I have been taking medication prescribed by my doctor to treat my mild UTI I have to take it once a day the capsules is on 100mg which is very low. I also still take my prenatal vitamins everyday I usual take my vitamins an hour after I take my medicine for the UTI is this safe?? is this to much medications for the baby?? Also I had polished my nails today and I had looked up is it safe to use nail polish in pregnancy and I read that it wasn’t I freaked out!! Do you think using nail polish is harmful?? I also use hair spray and I use olive oil (sheen) is this safe too?? I read online It's not I am so paranoid I am trying my best to protect my little one! Thanks Guys!