Hi Nattycat--sorry to hear about your fears. Most of us have gone through or going through various troubles that will affect our thinking. Sometimes there is a specific thing that has caused them and it may be possible to address that.e.g. feeling not able to socialise with people may make one fearful to go out and mix. My dear late mum had a fall down some stairs when young and she always had a fear the rest of her life. My daughter wont ride a bike because a friend gave her a backy and crashed into a wall resulting in her losing her front tooth.
Try reading and meditating on the first few sentences of Psalm 40 in the old King James Bible language. Changed my life 35 years ago. https://www.biblegateway.com/passage/?search=Psalm+40&version=KJV
Words can have a powerful affect on us for good and bad. That's why good counselling can be helpful and hope you find a good one.
By all means try medicines--I often need a good painkiller to get me through a few days work .
There is a connection between the stomach and the mind and the mind and the stomach. We feel anxiety in our stomach. Weve all ben told about foods that are good for the brain.(Caffeine, sugars and refined fats not so good)