Hi, justlikethat. I realize ws coming back is stressing you. Glad you had at least some type of break from his presence. Did you talk with a lawyer and start plans for divorce? Do you have family or friends you might stay with to keep some distance?
Hopefully others will give you more ideas to protect yourself.
I too met xwf online and after living together and Dday 8 years later (3 yrs. ago) found he wasn't what I thought and had "probably" lied about his xw and his relationship before me. Although he had been divorced 2 yrs. before we met.