Hi Heather,
Sorry to hear you are flaring, just what you need after such a dreadful time with your son!
As you say, you were expecting it because we all know such stress can cause a flare. It's also fairly common to flare after starting a new drug, I was told this when I had my worst ever flare after starting humira. However, it settled down and the humira is working for me so hopefully this is what will happen with you.
As regards your lower back pain, you can get inflammation in the sacro-iliac joints with RA, I get this occasionally and ,like everything else, it eventually settles down.
Could you get a depo jab to help you get over the flare? Might be worth ringing your rheumy nurse tomorrow.
Hope things improve for you soon.
Love Doreen xx