Imagination or pregnant?

Please can anyone offer any words of wisdom to me? My husband and I aren't actively TTC but on the 21/6 we took a risk the night before ovulation. Since that day I am convinced I'm pregnant but have had 2 neg tests in the last week. AF due this Friday 11/7. I don't know if it's all in my head but have had a number of symptoms since 1 week after BD. Hard to explain but just felt different, bad cramps 7 dpo, 2 mornings (9 dpo) I was nauseas and sick but fine the following two days. Quite bad mood swings. Sore breasts, exhaustion and headaches. And yesterday I got and still have a sharp pain in my right breasts. I'm driving myself crazy looking up all these things and attributing them to pregancy but could these all just be normal ovulation symptoms and I'm reading to much into it?