Spotting after sex

Valerie

Af is due today, had a tiny tiny amount of pink spotting last night after sex. Usual he starts me period, but nothing this morning. I took a test yesterday and it was BFN. Been having dizzyness, headaches, mild cramping, what feels like round ligament pains, super emotional, sore boobs, increases in appetite, and nausea for about a week now. Anybody else have this happen and get a BFP? When should I retest?