Should I test?

Karisa
A little background: I had an emergency surgery to remove an ovarian cyst in April. Had a normal period beginning May 1st.
 Now I am 4 days late. We had sex CD15&16 along with a few other days since. I'm having very mild cramping but no other signs of AF. Should I test or wait a little longer? Could I be pregnant or could it be aftermath from the surgery?