Low pulse rate and breathless

hi guys I'm well into perimenopause with varying symptoms over the last couple of years from hip pains to knee pain,had sore throat then neck pains to name it I've had it my latest thing is a bit of breathlessness ,and my resting heart rate can be 50 to 55 ? is anyone else having this it's quite worrying I do try to do at least 5 to 7k steps a day but I'm certainly no athlete as this can be quite normal heart rate for someone who is physically at their peak but I'm far from that!