Early pregnancy symptoms????

Stefanie
Help my husband and I have been trying to conceive for two years now and it seems like lucks not on my side. But I'm supposedly 2 wks late for AF. I'm feeling nauseous, have heartburn, upset stomach, flutters but for past 2 days I've been crampy in my lower back. I'm not sure if this is early pregnancy symptoms or just AF getting my hopes up helpppp.