It would be hard to make an accurate diagnosis without a full understanding of what is happening. It does sound like there are several things happening at once, including medical and psychological.
The GAD is the thing I feel most able to comment on because that is a clear condition that you already have. Guided meditation is great start, and I would add several things to that process. First, take a look at the interventions at Berkley’s Greater Good. They have several other techniques that can not only help you manage your anxiety, but also begin to improve your well-being. This is essential. You are not just trying to reduce the negative symptoms, you are trying to increase specific techniques to increase well-being.
Secondly, I’d take the character strength survey to learn what you are good at so you can begin to more toward higher well-being in your life — not just cope with the symptoms. When you say you don’t want to be like this forever you’ll not only want to reduce your negative symptoms, you’ll want to increase the positive.
Wishing you patience and peace,
Proof Positive Blog @ PsychCentral