Should have started yesterday!

I should have started my cycle yesterday according to this app, which has been pretty spot on. I didn't start yesterday and I haven't today as well. My hips hurt, my back hurts, and I have weird pains on and off in my tummy. Would you take a test or give it a couple more days? I just got off BC in October. I'm on day 30 from first day of last cycle. TIA