I know I’m just freaking myself out

Firstly, I’m on the Kyleena IUD. Usually my boyfriend and i use condoms too, but sometimes life happens and about a month ago we did it without one. That same afternoon I was freaking out about it and (yes I know this probably did nothing because I was already on Kyleena) took plan b too. I had weird symptoms and crazy anxiety for about 1-2 weeks after bc of all the hormones. My period was a week before the incident, so now I’m a week late. But my IUD has delayed my periods before and i know plan b can do the same thing. I’ve felt kinda PMS-y for the last few days but my period hasn’t started so last night bc my boobs are sore I was freaking out again I decided to take a pregnancy test just in case, and it came back negative. So I shouldn’t be worried, right? I think I just need support that I don’t need to keep freaking out.

Also, a little TMI but the last couple days I’ve had diarrhea. Idk if that pertains to anything or not