Pregnant or PMS

I don't know what's going on with my body right now. I've been experiencing pregnant like symptoms but it could also be pms. My AF should be arriving in 6 days, but deep down inside I would love to be carying a child. My boyfriend and I don't use any protection at all, and the reason why I haven't taken a hpt yet is this has happen to me before. I could swear on the cross I was preggo take the test comes out negative and boom period starts instantly. Has this happen to anyone before?