
Welcome, Sophie17! You will find many supportive people here. The resources to read here are amazing, and it sounds like you have already found and appreciated some of them.
If you stick around and start post here, you will find even more help. It sounds like you have more than enough people with BPD issues in your life!
What problems are you having with your mother in law, and how are you and your husband coping with them?
Are you currently having difficulties with either your mother or your ex-husband as well?