Please Help me !

First the last few days I've been having really bad cramps in my lower back almost like a heavy period but I'm not due yet.

I've been having headaches, sickness, nausea, constipation and darkened veins in my breasts and sore nipples. I'm highly emotional and tired too. But I think it's all in my head because of wanting to be a family so much. Glow is making me feel like a hypochondriac talking about endometriosis and pelvic inflammatory disease.

Is this normal? Has anyone experienced anything similar?

My body feels different than what I normally would during AF but I really need some reassurance. Could it just be my period? Or could I be pregnant?

Thanks in advance