Wanting to know if I could be pregnant?

Ok so i was suppose to start my period on the 20th of this month but I started on the 24Ith..Well i thought I had started.I had just a few spots that was it.I usually bleed very heavy but I had maybe 3 or 4 small spots that lasted maybe 2 days.Im always late thats normal for me...I can be up to two weeks late..But i dont think this was a period..The spots were redish and brownish.Yesterday I felt dizzy all day but i havent felt that way since.Me and my Fiance have been trying to have a baby and I was wondering if i could be prego?He's out of town with my vehicle and I have no way to get to the store for a test yet..Im new to the area and dont know anyone.I was just trying to get as many opinions as I can.Anybody please..Thanks