Late period. Neg tests. Nauseous. HELP!

Heather • Wife💑 & Mother👶🏻

My cycle is ALWAYS regular! ALWAYS! And I’m on the pill. I was supposed to start my period 11.4 so as of right now I’m 6days late. I’ve taken 2 HPTs. I’ve gone to the doctors and the did a pee test and a blood test and everything is negative. She told me to take another test Tuesday the 16th and see why it says. But I’ve been nauseous, cramping, a slight discharge and my nipples are tender. I don’t know what to think and I’m baffled. HELP!?!