7 Days Late

I have PCOS and taking metformin. My husband and I have been ttc for a year. My periods have been pretty regular and now I’m 7 days late. I have what feels like period cramps, itchy nipples and achy breasts and sometimes I get nauseous throughout the day. I took two home test and they say negative. Should I just assume that my period is just off track? I messaged my doctor and she said give it another week and if my period hasn’t started then come in to see her. I’m so tired of getting my hopes up.