Question about missed period and inactive pills

Theresa

So I am almost 3 weeks late for my period, last period in had was a week early and I skipped my inactive pills and went right onto the next pack... Now I am 3 weeks late, the last time I had sex was 3 weeks ago yesterday and yes I have taken about 25 test that were all negative and all different days. I have had some cramping and my boobs feel full. One person said it might be because I skipped that inactive week but someone help, I am freaking myself out like CRAZY!!!!