Pregnant or depo

Kary

My last period was dec12. I got my depo shot on the 19th and had sex multiple times the next few days following. I am now 15 days late my boobs hurt I’m cramping but not

Like a period cramp, I am extremely tired, and I been very nauseous.

But a test won’t come back positive yet.

Could I be pregnant?

Or

Are these symptoms from the depo?