Is there any chance that im pregnant or is it in my head?

If there was only precum on his fingers and they're the only thing that went in you when you missed your pills then no, 99% chance you aren't pregnant. If you been having sex and taking the pill then yes, it's still possible. You should check about a UTI or bladder infection, that would explain for your aches and urinary problems. Hard nipples aren't usually a sign, if they're sore it's different. I don't thin you're pregnant but just take a test to ease your mind.