Has anyone felt any movements?

I'm 15 weeks 5 days and I've like felt the baby move I think anyways but basically me and my partner had sex and I layed on my back after and my belly was swelled up on the right side and felt really tight and then I put my hand to rub my belly because I realised it was the baby and it moved so as I was rubbing my belly I felt something pushing on the inside of my belly it didn feel nothing like gas it felt so weird but good and ever since that day which was 4 days ago I keep waking up at night because I feel so uncomfortable and I feel the same thing but I've realised if it is the baby he or she alwyas wants to be up at 3-5 in the morning so he or she is a rebel already has anyone felt the same ?