Clomid User, tell me what you think?

I was diagnosed with PCOS due to high estrogen and elevated testosterone a few years back. I don't have the typical signs other than irregular periods/annovulation.

I have been taking Metformin the past 4-5 months at 1500mg.

I had taken my 3rd round of clomid at 50mg on Sept 3rd-Sept 7th, days 5-9 of my cycle. Since taking the clomid my cycles have been like clock work, 33 day cycle. I was suppose to start Oct 2nd but never did. That night I had period like cramps that lasted 15 minutes and then it was over. Every now and then I get short twinges of pain in my lower belly as well as lower back aches that last maybe a minute. My breasts are tender, very swollen and firm which is common for me about a week before my period is due, lasting until the end of my period.

Could I be pregnant?? I know right now there is a chance i'm pregnant but how high are the chances that my period is just late or the clomid didn't work this round?

What were your symptoms when you were pregnant?

Would appreciate comments and opinions from from everyoen but more so former clomid users.