4ish days late

Hi ladies. I need some help.

I had my last period 8/12. I am always on time- maybe late by 1 day. But this month I’m now almost 4 days late.

I have taken pregnancy tests and they all came back negative. I had food poisoning the 6th & 7th.

I am sexually active. I am really close to calling my clinic and seeing if they can do a blood test for me. My boobs are killing me and I am cramping some. The bloat is unreal too. Idk what to think 🥹