Am I psyching myself out?

Frances

So on about July 15th my boyfriend and I had gone out of town for a weekend and we had unprotected sex. Now, he never finishes in me unless we have a condom, he’ll pull out and we’ll either use a condom for the remainder or I’ll blow him and he’ll cum in my mouth. Now, on the 15th we didn’t realize it but I was in my fertile period, and during one of our sessions he thought he was about to cum so he pulled out really fast and by the time I’d gotten flipped around to finish him, he said it was basically pointless as he was pretty sure he had started to go flaccid. Now there was no jizz on him, and as far as I could tell there was none in/on me, but when we got home and I looked and saw that that had happened in my fertile period, it scared us both. Now, I’m 3 days late, and early early this morning when I peed I had just the faintest bit of pink, so I got excited and thought it was finally starting but it’s stopped. I don’t know if maybe I’m freakin g myself out and the stress is causing me to be late since I’m already just a little irregular anyways, or if I should be worried. I’m going to Walmart later tonight to buy some tests but I wanted to know if anyone had any suggestions. So far the 3 days late and faint pink is all I’ve had, no nausea, no breast tenderness or bloating. I had PMS mood swings right before when my period was supposed to start, but those have gone away and now its just anxiety.