28dpo and AF is 15days late

Hey y’all, I’m scared to test because up until last week they have all been BFN. My fiancé and I have been TTC for a month after getting my mirena out. I seem to have a normal period starting right when I got it out. But I’m unsure what to do. Everyone says I am way moodier and I’m tired more often along with almost EWCM. On Thursday I seem to come down with food poisoning and was sick all night and part of Friday. Woke up today and was feeling great until I took a short walk and got a headache and sick to my stomach. And there has been cramping pain and dull ache around my stomach sides and bottom.

Any advice on what to do would be great.