Should I be worried??

Yesterday I forgot to take my bc until right before I went to bed. But of course my husband and I had sex before we went to bed and he came inside me not thinking he was going to (we usually do the pull out method). I took my bc right away this morning. I was ovulating around the 14th so a couple days ago, but I don't start my period for another two weeks or so. Could there be a chance I could get pregnant? It's still way too early to take a test but just a little worried because we are trying to avoid pregnancy for at least another 3-4 years when his contract is up for the Marines.