Missed birth control! Pregnancy?

Aaaaaa

Ok I may be overthinking but here’s the jist. On Sunday (like 2am) my bf finished in me. I’m on birth control and I rarely miss a day plus I take tests frequently(just to be extra safe). So I came home Sunday night and noticed that I missed 2 days of my birth control but Ik for sure I took one Saturday night, so I have no clue what days I missed. Anyways my week goes on like normal, but when I came home from work last night (Tuesday), I took everything off and sat in bed and noticed my boobs were sore. Thought nothing of it, having endometriosis happens all the time. Except my nipples hurt. I’ve never had them hurt before so I’m a little scared. The time he finished before this time was 3 1/2 weeks ago. But I’ve taking 2 test since then and there negative. Please someone put my nerves to ease.