am I pregnant?

I ate Taco Bell yesterday and I'm lactose and tolerant but I know my body's reaction to it... and this time it's different. me and my boyfriend have sex everyday/night... never protected sadly but he always pulls out. but this time last night i had a scary dizzy spell mixed with a little nausea.. it was so bad I had to lay down for the rest of the night & I was light headed.. this morning I woke up and it didn't go away the nausea stayed but the dizziness is touch and go....