Yes Bipolar causes hypersexuality in some people, but as Capriciousness said.. as someone with Bipolar you need to do everything you can to stay stable and healthy.
If swinging isn't healthy for your relationship then can you and your husband seek out therapy to help repair your marriage? Do you want to be in a relationship with just your husband?
Are you in treatment for your Bipolar? You didn't include that information. Most people if they has distressing symptoms will agree to work on finding medication that will help them control impulses.
Even tho you were just recently diagnosed BP , Most people have been dealing with Bipolar long long before they actually get the diagnosis.
Welcome to PC