Could i be pregnant? answers?

me an my bf had without a condom 2 times this weekend. i just got off my period that friday an spotty on saturday an was completely done by mid day saturday, however we had saturday night an the next morning i was pinkish brown spotting til monday morning an then it stopped. Ive been dizzy an lightheaded and feeling a little "FLOATY" the feeling you get when u walk on a dock feeling. i do have allergys really bad but that doesnt have any affect on my period? my bf never d in me