Fitness tracker accuracy?

I have the huawei gt fitness tracker.

The whole time my heart rate was 62 to about 135

But today it is mostly at 54 and the highest today was 118, I have been suffering from anxiety states for years and have panic, I haven't left the house for over a year, so I go away or only drive to the front door or into the garden really worry me

The best way to overcome fears is to become active yourself and master problems, i.e. Not to hide.