I am 4 days late from my period. Having slight cramping nothing crazy nausea/ sudden onset of dry heaving for no reason. I’ve been using cheap one step pregnancy strips and they keep reading as negative. Do I not have enough hcg to detect or is it my thyroid? The doctor did up my dosage to 75 mcg to 100 mcg which I’ve been doing for about a week or so. Wondering? If maybe it’s that and I’m not actually pregnant. First time trying to conceive a little one. Thanks for any help