Health Anxiety

[Chicken_Wings]

I was just wondering for anyone who has experienced anxiety around their health, what can you do other than getting your brain scanned to convince you that you don't have a tumor, or getting fully tested to convince you that you aren't developing dementia?

I basically imagine the most extreme possible reason for something that I am experiencing and that's it, I'm convinced thats what I've got.
Like at the moment, I'm noticing that my memory isn't as good as I'm expecting it to be, so therefore I must have something wrong with my brain.
Or I noticed that I am more aware of my top lip than I normally am and just like that, I'm about to get mouth cancer.

[Chicken_Wings]

ok, so I had a full set of blood tests done a couple of weeks ago. 

They told me everything was fine, they've just called me and told me I need to have a repeat blood test in a month because i had slightly abnormal liver function.
I asked what that meant and they said 2 of my markers are slightly raised. Its nothing to be concerned about and they just want to repeat the test in a month to check it again. 
I don't know what any of this means.

I don't really drink so I know its not from alcohol. I haven't actually had a drink in about 6 weeks.
So of course, my mind jumps immediately to the worst, thats it, I'm going to die. 

I wont know anything more for a month. So now, I'm going to spend the next month thinking the worst. 
How do you cope with this?