I don't see how being honest is stupid. Your pdoc needs to know what's going on in order to treat you properly. As long as you're honestly thinking of hurting yourself and not just saying it to get attention, go ahead and tell your pdoc and get help.

If you build up a relationship with your pdoc that has trust, mostly by being honest about how you're doing, you can tell them pretty much anything and they'll know the proper way to react.