please please comment. Im begging.

so. last month I didn't get my period and I believe it was due to the high amount of stress I was under, so I took a pregnancy test and thankfully it was negative. I have not missed one single pill or been late once this month, my SO also pulls out which is something he's really good at. My period week is coming next week, and I've been having some PMS symptoms leading up to it- and I know that's what they are but I just can't take my mind off being pregnant! I'm trying not to stress but the thought won't leave my mind. Silly right? Can someone else give me some reassurance? I would highly highly appreciate it.