I know exactly how you feel. Hang in there. Try not to let yourself get too down. Pneumonia is very difficult to get over, you are immuno-suppressed which makes it worse, and you had a nasty case of it. It happens and doesn't mean your body can't cope. Drink plenty of H2O, focus on kicking the pneumonia for now...if they had you stop the RA meds, see if there something else you can take in the meantime to help out as much as possible, and when you get better and back on your regular meds talk to your doc and make sure you're doing all you can with staying healthy, there are vitamins you should be taking while on them (folic acid/b vitamins), drinking extra water on a daily basis, etc.
I know how tough it is when you're sick like this. Take care and I wish you good health very soon.