What should I do? To drink or not drink?

Okay, I’m 11 DPO and had a huge dip this morning. I was cramping yesterday and nothing this morning. Slight cramps/right pelvic pain and back ache currently. It comes and goes. My husband and I will be attending a party this afternoon and I’m not sure if I should drink? I took two cheapies about an hour ago and they were negative 😓 I’m thinking this is a AF dip?

Thank you in advance!