If you were here in Florida, I would suspect the weather had something to do with it, but probably not there! Check with your doctor.
I was on a low dose hrt for many years because the doctor said the benefits for me far outweighed the risk. It helps protect your bone mass too. For me, with all the problems I have with my back it was great. I could sure tell a difference when I quit taking them. I wish I had never stopped!