Sweetie, I'm so sorry you're going through this. It sounds really rough. The good news is that HRT will eventually reduce your body hair pretty significantly (except for facial hair). You probably knew that already, but it's good to have that to look forward to.
Have you talked with your therapist about this? My understanding is that compulsions like this are usually symptoms of deeper problems. And although transition helps us to feel better about ourselves, it alone doesn't address all the baggage that we take into transition.
Please take care of yourself and do what you can to treat the underlying issues, not just limiting your access to tweezers.