I'm sick

I'm 12 weeks pp and I don't know if I'm depressed or not.. But something is wrong. To be honest, I'v always felt this way since having kids, but this is my 3rd baby.
I don't feel sad every single day, I have good and horrible days. But I am obsessively jealous. Particularly over my husband but also over pretty much everything to some degree.
The thoughts are intruding, constantly in my head. They make me sad, Angry and sick to my stomach at times.. I see a therapist but I am so embarrassed about my jealousy issue I haven't told her.

My jealous makes me feel like a toxic person I feel like i shouldn't be with my husband because I'm not treating him the way I should be.. Last night I caused an argument over a past relationship he had nearly 8 years ago!! But even thinking about it, makes me sick. I can't control it. It hurts so much that I can cry just thinking about it. But the thoughts are so intrusive, as soon as I'm not distracted they pop into my head.

What do I do I need help, I feel like I'd rather end my life than continue to feel this.

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