Am i pregnant?

Destinie
Me and my husband just got married a month ago and we've been ttc with baby #2. My period is 4 days late and I have been having some really intense cramps and headaches. As well as sharp back pains, nausea, fatigue, etc etc. I took 3 hpt and all came back negative. Am I doing something wrong? Am I pregnant or just having pmc symptoms?