My period is 21 days late

I’ve take 3 test and they’ve been negative, assertions the time I was supposed to get my period I was breaking out with in grown pimples and I was super horny. I thought it was sure to hormone’s from AF but I never got it... so I’m confused well I was feeling my nipples for breast pain and realized around my areolas are kind of sore could I be pregnant? I’ve gotten allot of acid reflux but still the test was negative