I know where you are coming from I feel that way too. I had anxiety for years - it comes and goes. Your not alone
I worry about my health and lately I have worried about my parents - like what will I do without them. I believe I have a chemical imbalance because I live in a nice house, have a understanding husband, two healthy young kids, I am able to stay home with them and homeschool. So why am I this way? I worry alot and I can't even watch the news because I start to cry if someone loses a loved one. I feel like I will be there one day too and how will I be able to handle it. Ever since I turned 40 I have been more concerned about health and death.
If you look up on the internet about the symptoms of anxiety you see a page of symptoms. You can get a choking sensation because your mind is so powerful it can make you believe it. You will also feel a tight sensation in your chest. Adrenline is released in the body and it is absorbed in the muscles which may make you tired or will sore. What you need to do is some breathing exercises. Like have you tried yoga or meditation. They even have walking meditation if you can't sit still to listen. I take 30 minute walks to calm myself down. I read alot of self help books and they have anxiety workbooks. Your local hospital should have group meetings and you could meet people with the same problems. It makes you feel good when you talk with others who may be going through the same things.
I don't like using medicine but some people have to. I take supplements b vitamins, I eat the right food - no sugar because it can make my anxiety worse. I eat non processed food and no caffiene. I also see a acupuncturist every week. She puts the needle in the right spot for anxiety. When I need to calm down I doing breathing exercises and I use positive affirmations. I do the "what ifs" and I worry for nothing. The reason I worry because I think I will die too young and I won't be there for my kids or something tragic will happen. So I have to use positive affirmations to erase the negative feedback I give myself. What does FEAR stand for "False Evidence Appearing Real"
I can't mention any resources on this message board but if you really do your research at the book store or online you could find so much stuff on anxiety that would help you. Your not alone, just be patience with yourself and you will recover from all of this. If you ever want to write feel free.