So this is all im worrying about. My last check up was before my 16th week of pregnancy. My OB tells me that she's going to try if she could already hear my baby heartbeat. But we cant hear anything from the device she used. She told me that I shouldn't worry about it because its normal. She said that every woman has different pregnancy. But my friends told me that im almost 16 weeks there should be a heartbeat. Because when they were pregnant they already heard it when they were 2months pregnant. Should i be worried? Is this really normal? Please answer me. Im really sad as of now and overthinking. This is my first baby :(