Help! I think I may be pregnant??

So me and my bf were fooling around this morning and he went in me like twice. Did not cum, and it was only twice, but he was very into it and were worried about pre-cum? I am due to get my period in 4 days so in not ovulating or "fertile" at the moment, but non-the-less, we are concerned. Do you think I should be worrying? Or should I send him out to get plan b?? Help, I'm freaking out.