Possibility of pregnancy?

Patient: I had unprotected sex on the day I was thought to ovulate. The first time we had sex we used a condom. The second time we did not and he pulled out way before. I have heard that sperm can still be in the urethra and get flushed out by pre-cum and a possibility of pregnancy. I am now 11DPO and last night I had very light blood. I have 3 more days before my period is due. Yesterday I also had weird cramping just on the left side. Not like my normal PMS cramps which I rarely get. I have also felt kind of dizzy for the past three days and very sleepy. Does this sound like I could be pregnant or am I imagining things? I also took a HPT last night and it was negative.

Symptoms: Light bleeding, cramping, dizziness, fatigue

Doctor: