Sounds like you're having quite a time.
I feel compelled to point that it really isn't exclusively your job to:
"feel this sort of pressure to deal with both my partners' needs and worries over my own because they're the ones in precarious situations--I'm the one getting everything I could possibly want, right? Itís my job to moderate things."
I get you're feeling it; I invite you to stop.
If they're actually PARTNERS, I'm guessing they want to support you too. Let them. Share with them. Everything. Not just the good feelings.