Health Anxiety

I’ve always been a worrier and at times it has gotten out of control but I once again am back at it. Worried I’m dying of some rare disease or that doctors are just dismissing my symptoms. I’ve been through therapy and was doing better for years and now I feel like I’m falling back down that dreadful hole. (I did have recent surgery but I think I’ve been this way for a while) I’m getting married this year have a great job and so much to look forward to but cannot shake this. any advise is truly appreciated 😔