Pregnant?

First off, me and my husband are not ready for a baby. We’re a fairly young couple and our careers are only just taking off. We got a bit hot and bothered the other night and let it slip in without a rubber. I’m in the peak of my fertile window so I hardly cared or noticed in the moment, but he ended up coming inside. We got it out as quick as possible, but of course there’s always a chance - and a good one this time. The next morning I took a plan B pill, but I noticed some milky discharge leak out. It’s normal for me and a ton of other females to have a decent amount of discharge the morning after sex, but this was much more watery than usual for me. Could this be semen? And how possible is it that I could be pregnant? I’m a bit nervous so any and all comments of advice or assistance would be greatly appreciated! Thank you!