I cant find the heartbeat

So, Im 13+1...got my scan last week and everything was ok. Today I had the brilliant idea (not!) of trying to use a doppler (angel sounds). I tried twice already and I cant find a heartbeat. I can only hear the placenta or whatever that woshing sound is. Now Im here worried sick! I have a docs app tomorrow and I just want to cry as I cant stop thinking that they will tell me that they cant see the heart beat 😭😭😭 I know that sometimes is hard to find but on youtube people just find it so easy that I cant stop thinking that something is actually wrong 😭😭