Wishful thinking??

My last period was 4 days late. I was in a lot of pain almost like a miscarriage but not as much blood but only lasted 3 days...now my breasts have been tender & swollen & my belly muscles feel tight & I keep having little twinges in my lower abdomen. Could I be pregnant?? I would only be 4 or 5 weeks along. Should I just wait for my next period or test now??