I don't know what to do..

My exboyfriend and I broke up about three weeks ago.. We had said we weren't seeing each other anymore.. But 2 weeks later we saw each other and ended up having unprotected sex.. He said he came in me but then he said he was joking and that we should just keep going. So we did.. And he eventually pulled out minutes later.. He's never lasted so long before.. So I'm thinking he did come in me and we just kept going.. And then he came again... Or idk... That was last Sunday.. I woke up this Tuesday feeling very nauseous.. And the typical pregnancy symptoms.. I told my mom and she said I have to wait at least 14 days after so I can take a pregnancy test.. Idk what to do.. I have this weird feeling inside me that doesn't go away.. I'm afraid that I actually am pregnant and I don't have him anymore.. When we were together we tried many times to get pregnant and it never happened.. And now that we're not together I'm afraid I am actually pregnant..