Late Period - Negative Pregnancy Test

Leah

Hey guys, so I’m flipping out. My period is late by 11 days, it’s never normal, in December I got it twice, but I haven’t gotten it for January yet. My BF and I only had sex, twice, he didn’t cum in me, and we used Plan B, just as a back up. I keep getting my period signs on and off (acne, boob pain, etc.). I’ve now taken two tests, and both have been negative? How worried should I be? As I mentioned, I’ve NEVER had a normal period, ever.