really worried at 13 weeks and 6 days pregnant 😩

I'm 13weeks + 6days pregnant and really worried as I don't feel pregnant anymore. My boobs don't seem to be sore (but this wasn't too bad in the beginning anyway). But the sickness seems to be not so either and I don't really have any cramps or twinges. I felt a little flutter twice last week but nothing since. I paid for a private skin on Saturday and all looked well. The only thing is my last pregnancy ended in a missed miscarriage at 17 weeks and I'm worried this will be the same. I went to my midwife and they couldn't detect a heartbeat so I really don't want this to happen this time. Ahh I'm stressing so much! 😭