Ok so I am 15dpo today and have no symptoms of AF coming or pregnancy symptoms?

Ok so I am 15 dpo today and am having no symptoms of AF. NORMALLY I have severe cramping like a day or two prior to starting and my are usually very sore and tender to touch...... but this month nothing! (this seems very bizarre to me because normally its like clockwork) I am also having no pregnancy symptoms at all. The only thing I can think of is that I have had cold like symptoms for the past week and a half. Sore throat, cough, stuffy than runny nose. I took a test at 12 dpo but it was negative...... was it too soon to test? I was supposed to start AF yesterday but have yet to today. Im not going to take another test for 1 week so im not wasting my money. Do you think I might be pregnant? How many days DPO did you get your BFP?