Period & Pregnant?

So my periods have always been irregular and I started back on birth control Feb. 17th. I didn’t take it at the same time every day and I skipped 2 pills in the 3rd week (3/8 & 3/9) which is the same week that my husband & I had sex (3/8 - 3/11). We used no other form of protection. I now have what appears to be my period which started yesterday (3/13). Is it possible that i still could have conceived even though I’m currently on my period? Will i have a short period if i conceived or should i just wait to test in 2 weeks?