15 Weeks No movement

I’m 15 weeks and 2 days with my second. Around this time with my daughter I started feeling her move. I haven’t felt anything yet with this one and it’s getting me really nervous. I’ve only seen my Dr once since we found out I was pregnant. My next appt is next week. I have been having to pee a lot this pregnancy. Could baby be sitting on my bladder or possibly in a position that I can’t feel him? I told myself I wasn’t going to buy a fetal Doppler to use at home but I’m really close to getting one. Anyone else feel their second later into the pregnancy?