Pregnancy or overthinking?

Hi! Recently, my birthday was mid august, I was ovulating then ( seeing the egg white discharge Is how I knew) my husband and I had sex around 2am, we use the pullout method.. but within about two weeks after, I’ve been a little nauseous every time I eat, heartburn/acid reflux literally every time I eat as well as gas.. little headache from time to time (nothing to bad. Just really small then it goes away). My period is irregular after my thyroid medication being upped , but my last one was around aug 3 or 5th. Any tips or advice would help. Besides saying go to the doc (not being rude, just rn isn’t the best time for me to go)😅

Thank you!

Edit - my med has been upped for ab 4 months and I haven’t had any side effects from that at all!