how can i face my fears

basically i have a fear of anything medical, clinical, doctors, nurses, health matters etc.....and i have to have health check ups very soon, like get a blood test done and go for my diabetes type 2 review with the nurse....and i'm afraid because i've gained weight, after losing weight years ago because i became very overweight, that's how i got diabetes in the first place, but i lost 3 stone with diet and exercise and reversed the condition....but now i've put on weight again and lapsed with my gym attendance, because i lost motivation.

and i'm just scared with these up and coming tests and check ups they will find something wrong with me? and if they did, how would i deal with it?

i'm 47 so i'm not too old yet, i'm terrified of doctors, nurses, hospitals and anything clinical.

what can i do?