PLEASE HELP! Don't know what to do or think!!!

Mercedes
Friday will be a week that AF was due and still nothing. My Birth control was removed April of 2014 and AF was irregular from 2-4 days for the first few months but has been spot on the past few months except this month. AF was due the 30th then Glow calculated it to start the 2nd and still no show and now due the 6th which is a week past due. Iv had false hopes and symptoms due to wanting it so bad even though they say it happen when you stop thinking about it and well last month I was at that point didn't stress on anything about it- not cause I stopped trying or caring I just didn't think as much-anyways- I'm scared to test cause now I have real symptoms and don't want to be disappointed. Instead of AF showing up- on the 3rd after some foreplay/ intercourse their was some blood I thought AF right away but didn't/haven't needed a pad or tampon. I keep feeling what feels like AF then go to check but still nothing but some light red/ brown and pink spotting but see some blood on toilet paper but not red red but light red. Iv had a weird tension on my stomach area I feel bloated but I'm not as well as a tighting feeling it's hard to explain. Iv done all the math and the first 2 due dates for Aunt Flo are exactly 12 days after having intercourse and it Being my fertile week. I didn't even notice ANY of this till a lady at work asked cause I had been sick and she just kinda though I was this was said 2 days before AF was due and I didn't know cause I had no cramps like usual and that's when this all started. Idk if I'm just setting myself up or not what do you think?