Anxiety with pressure in head and numb hands and tight in chest but usually subsides but it's not this time plus I have pain in left center back?

Check with an MD. first to R/O medical causes. If medically clear, seek out a mental health pro who has training in anxiety. You have several classic sx's, of which there are over 33. Here's a reference to do this yourself: http://www.psychologyproductsandservices.com/page2.html.
Chest pressure? If you are having chest pressure and pain in left back area that could be heart related and you would need to go to your doctor or urgent care to get an EKG. It could also be a panic attack but I would rule out heart atItack first. If you would a consult to talk about this further with me, I am avaliable today.