i get chest pains when i have high anxiety and i'm thinking this might be the case for you too - i don't know if you know if that is going on. always a good idea to have other things ruled out though, if there is any uncertainty.
hang in there. i think it is great about the meditation. it would do me some good for sure. but i am terrible with stuff like that.
glad you are walking too. i found that when i used to run, well i had to focus very intently on breathing and rhythm - that would flood my mind and cleans out some of the free floating junk.
~ waves ~