So Hi everyone, I'm Olivia and I'm 24 yrs. old. This is my first thread, and I'm new to this forum so please go easy on me. Lol.

I have been diagnosed with manic bipolar since the age of 13, and have had a history of different mood disorders and serious substance abuse problems. I have been clean for over 2 years now. I become attached to people to easily and am an EXTREMELY co-dependent person, especially when it involves my husband of 2 years.
My husband and I had a brief split (a month long) about 6-8 months ago, during that time he went back to his ex of three years off and on. They slept together a few times, and he told me he still loved her, etc. She then broke it off because she claimed she was pregnant by her prior boyfriend who she originally left my husband for in the first place. Anyways, I was obsessed with the girl prior to this all happening. I messaged her on his Facebook a few times acting like him, she'd message back, then she found out it was me and blocked both us. Then at one point she unblocked us, and I added her. I became even more obsessed. I looked through her pictures almost everyday, I'd stalk her Facebook page for updates. I'd go out of my way to comment on things just to see what she'd say.
Since my husband and my split, and him going back to her my obsession has worsened. I made a fake Facebook just so I could be friends with her. I find myself looking at her profile every hour, sometimes more. I look through her pictures constantly. I google search her and creep on her instagram and old Myspace just to see her. It's not an attraction thing, it's an obsession. I am unhealthily jealous of her, I think shes beautiful. Way prettier then me. My husband doesn't know the extent of my obsession but even what he does know makes him uncomfortable. I hate it! I don't want to be this way. I don't want to feel like I'm still in competition or to obsess over her and her every move. She is in fact pregnant, I guess by her boyfriend but I even find myself stressing and freaking out about it possibly being my husband's child. I mean it was around the same time period that they were together that she become pregnant, even though that's why she says she broke it off with my husband. I can't stop myself from worrying or from obsessing over the girl. I hate myself for it.
Today was the day of my psych eval and I was prescribed Lithium 300 mg 2x daily, by my psychiatrist. She asked me tons of questions, yet I never mentioned this because I didn't even think to do so. Now that I think back on it I wish I would have.
Is this behavior normal? Does everyone do this? How do I stop it? It's almost uncontrollable. What do I do? Please help.