I throw up if I don't medicate myself because of PMS. I have to take 4 IBprofin every four hours to keep the pain bareable (meaning I still feel it, but I don't puke and I don't pass out). I always pee a lot, but more so around my period because you retain water. I also get *really* hungry about a week before my period so...yeah...if you've had unprotected sex, then wait until you're meant to get your period. If you don't get it within a week of when it's due, wait another week, then get a pregnancy test. Either a pee one or go to a planned parenthood clinic and you can get a free test from them which is probably going to be more accurate.
For now, just breath. I know it's scary (having had MULTIPLE panic attacks due to thinking the pill wasn't working for me), but even if you are pregnant, there are various options that will make it fine for you to deal with. Good luck, love. <3