Help me

I broke up with this girl cause my mental health is taken a toll for the worst and we're currently talking and I still miss her etc etc but I'm anxious to go outside my house cause her friend said they have connections and there gonna beat me up but I feel like it won't happen but then I feel like it will happen and I'm just so like overwhelmed with everything it's like what the hell do I do and I regret breaking up with her but then I don't so it's like what am I meant to do