Has anyone here ever gone IP before or instead of harming yourself?

I'm in a situation where, according to my therapist, I'm having psychotic thoughts that I have to seriously harm myself (I don't think they're psychotic, personally). I think it's my fate and I have to do it, regardless of what I or others want. I've been hanging in there and only self-harming slightly, but I'm getting "messages" that I need to harm myself more seriously, to the degree that I need urgent medical attention.

Assuming I can hold out until Monday when I meet tdoc and pdoc, I'm wondering if I should just suggest a short IP stay. If I don't have means to harm myself, then maybe I can distance myself from the thoughts (and they can change my meds).

Preemptive IP stay? I hate IP with a passion, but at the moment it feels like I either go before or after I hurt myself. Maybe it's better to go before?