pregnant??

so me and my boyfriend have been trying to get pregnant and this cycle we knew exactly when i ovulated and had sex almost everyday for the week. well i have 11 days till my period is predicted to come and for the past couple days i've been very crampy & SOOOO tired and i've had migraines everyday for the past 3-4 days. Yesterday when we had sex i was trying to reach the big O and i realized that it was taking abnormally long and i just didn't end up finishing (which normally doesn't happen). Could i be pregnant????