Mood changes

Ok I turned a corner with my therapy and have had some release from the thoughts / memories that were causing my anxiety and have made some positive steps towards things I've been wanting to do for some time but could never concentrate on actually doing them as anxiety was distracting me almost constantly. Hooray, I should be happy about this and well I am, but I've noticed over the last week that I'm getting grumpy and moody for no particular reason, I'm not exploding in anger or anything like that, just seem to have this general pissed off feeling and I don't like it as it's not how I usually am. I hope it's just a part of this recovery process that I'm now in.