My husband told his parents that I’m going to therapy

Ok so I’ve started going to therapy recently for PTSD since my miscarriage that happened at the beginning of the year, and tonight my husband informed me that he told his parents - one thing I asked him NOT to do. They’ve not been very supportive to me since I had the miscarriage and can’t understand why I’m so effected about it. I’m so upset, not even angry, just really upset. His mother is one who will spread gossip throughout the family like wildfire, and I know that Christmas at theirs will be very awkward, as the whole family attends. It’s upset me more as I haven’t told a soul, not even my own family or really close friends who I tell everything to, it’s not that I’m ashamed, I just don’t want everyone knowing my business, especially something that I think is extremely personal.