Just finished ovulating and now shooting pelvic pain and back pain

Hello,

My last period was 6th Jan, it lasted for 7 days, I am on a 28 day cycleand then from 14th uintil now we have BD. I think I ovulated Thursday/Friday or around then and since yesterday evening I have had shoting pelvic back and constant back pain. I am tired and breasts feel sensitive but those two signs are normal before my period. I have done a test, negative but are these early signs of pregnancy? I didn't have pelvic or back pain in my first pregnancy and I then miscarried with my second in October last year so could I be pregnant or my body saying no again?

Thanks