Should I wait to test?

I had my implant removed the 26th of Febuary. My doc did a pregnancy test and it came back negative. I started on Nuvaring the same day. My bf and I have been having unprotected sex between every day and every other day. I'm supposed to take the nuvaring out on Sunday to get my period. But I've been nauseous and puked this morning. Do you think there's a chance I could be pregnant?how long should I wait to test?