Worried I can't feel flutters

❤️🌺

From 13 weeks up until today I was feeling little flutters. Now today I'm 16 weeks and not feeling much of anything. I have a home fetal Doppler and used it to find the heartbeat this morning and found it. But I'm dril not feeling flutters. I want to check again but I'm scared I'm overusing it. Is it normal to feel flutters one day and then not really feel them the next. And how common is a miscarriage at 16 weeks?