I had unprotected sex and two days later I started bleeding. My periods are never on time but I was due to have my periods around that time. My periods are always heavy painful and last for a week and can last for two week my doctor OK with it as I always had this since I started my period. This bleeding was different. It was very light lasted 3 days pink then turn a brownish colour and it felt very different. It's now been 2 Weeks since this bleeding and I getting mild cramps on and off during the day for the last week, also I feeling dizzy, headache, tried and backaches and I feel sick. Could I be pregnant or is it my mind playing tricks with me lol?

It is too early to have "signs" and really no way to know till next month and if you miss that period, so for now, you wait, and if you miss the next period, you wait till you are two week late for it, and then test.