What symptoms did you have when you knew you were pregnant

I constantly keep telling myself that I'm pregnant. I was only sexually active for three months and stopped in Jan. I recieved my period normally each month and while being sexually active I used three methods of protection including birth control condoms and pull out method. I even took a pregnancy test in Feb that came back negative and got my period that month! That's how paranoid I am.

If I get a headache, if my back aches even if I have a runny nose I blame it on pregnancy just because I'm so paranoid, and Ive read those can be symptoms

My question is what symptoms did you have besides a missed period if any, did you have before knowing for sure you were pregnant?