Has it happened to anyone?

I’m currently 8 days late for my period.

Last time I had sex with my boyfriend was unprotected at first but at the end he used a condom. Today we had sex and we didn’t use protection.

Anyway, I haven’t been this late since like I can remember and I haven’t been thinking about it too much because I’ve other things going on.

I’ve tried to be active and I just get some cramps during the day and they go away for almost the whole day.

My boobs are sensitive and I vomited today.

I took one pregnancy test on February 13 and it came back negative. took the test around 10:30pm

My cycle might be changing but last time it did was last summer. Any thoughts?