PMS, Side Effects or Early Pregnancy

Heather

So I had a cycle of Clomid and the trigger shot on 1/12. My period is predicted to start on Saturday 1/27. I have been having some symptoms such as; low back pain, sensitive nipples, clear discharge and cramping. I'm dying to know if it's PMS, early pregnancy symptoms or side effects from the clomid and trigger shot. Anyone else have this happen?