Really sorry you are feeling so shite. Sounds like, as a doctor siad to me, you have had a big life change to cope with [children?] and that your body is trying to cope with it and maybe needs some help.
I clicked on this as I have an anxiety disorder which I feel at the moment is fairly well mnanaged. I had some anti depressants for a little while which seemed to stabalise my mood enough for me to kind of get to grips with what was going on. Bit like having a plaster on while healing the underneath.
I am off that medication now and have a supply of beta blockers. hen I feel the physical symptoms of anaxiety - bowels feeling crappy, sicky,l extreme butterflies, thoughts rushing round, sweats, heart rushing etc - I have a beta blocker and it works miracles, again enugh form me to sort out something that has maybe triggered it.
It was tricky to figure out everything you wrote above but am I right in htat you worry when not withthe children? And that you have supportive partner. Please do talk to your partner all the time. Mine has become my mental health buddy and I think he preferes to know everything than worry himself, guess how I am etc. And often he is fantastic at helping me nip it in the bud.
This is like any other health problems. You cannot solve it alone, but need your partner, family, doctor etc. I have been in your situation [its so shite, so sorry] and got through it and feel generally fab now.