can you miscarry beforr finding out your pregnant??? help!

Leigha • Mama to Ollie! Tried for almost 2 years, diagnosed with PCOS. Now trying for our second!

I am 11dpo I had been having sharp pains in my left lower stomach for a couple days and now I have extremely bad left lower back pain. it hurts so bad I can barely stand up. I haven't taken any pregnancy tests yet as I was waiting for my missed period first. I'm getting worried something is wrong. does anyone have any suggestions?? I don't usually get any painful pms symptoms.