miscarriage without knowing I'm pregnant?

Brittany • TTC 2nd child, on Metformin for PCOS

so I was due to get af today. I did Clomid CD 3-7 this cycle. I did ovulate. had lost of nausea and even vomited once, boobs were sore. but never got a positive test. well today i did start bleeding. but it's very watery? And some clots? It's not what my periods normally look like. could I be miscarrying? Or just a weird period? should I call the Dr and mention that I think somethings off, just in case?