Light headed

Kathryn • Hello everyone, my name is Kathryn and my fiancé and I are trying for baby number 2. We have a 4 year old daughter
Been feeling light headed all night on and off. Not terrible just enough if I move to fast one way or the other. I also had a few slight cramps earlier. My period is due in 6 days so I don't know if it's my body messing with me or there could be a chance. We have only had sex twice to where he has came in me and it has never happen before when I got pregnant off one or 2 try's. Not sure what to think..has anyone else gone thru this and got their BFP?