Is stress causing me to bleed in between periods

So going back alittle, I got my period on Feb. 1st. It lasted 7 days the usual. My bf and I had sex on the 9th. We used a condom and he didn’t cum when we were doing it. We still wanted to be safe so we checked the condom by pouring water in it, it didn’t break or tear. We had no sex when I was fertile or ovulating and I got my next period on March 3rd. It lasted the usual 7 days. We haven’t had sex since the 9th of Feb. I am in college and at the time was super stressed because of midterms and other stuff like my job, and all. I also have bad anxiety at times. Around two days after ovulation (March 19) I was bleeding alittle. It only lasted an hour or two but it was freaking me out. Tues. and wed. I wasn’t really bleeding but yesterday it happened again because I was alittle stressed and then when I see I’m bleeding/ spotting alittle it makes me more stressed. I feel it always happens when I’m stressed, and when I try to look up possible reasons the first thing to pop up is pregnancy which then really makes me nervous even though we use protection and doesn’t cum in me. Is stress really doing this to my body?? Does anybody have certain stress relief techniques to help me out? Cause when they happen I get scared and fear I won’t get my next period from it