I just wanted to share something with you. I've been HOH all my life (it was hereditary). I've always worn BTE and did a little lip reading. I really never had problems until it came to using the stethoscope. I tried amplified stethoscopes, but they just weren't powerful enough and I was frustrated with having to take out the hearing aids.
I finally went to my local Voc Rehab and explained my difficulty. They set me up with Bluetooth hearing aids and a receiver that I wear around my neck. The stethoscope they gave me attaches to the receiver and sends the heart/lung/etc sounds to right to my hearing aids. (It's all from a company called Phonak). While it does surprise patients because it looks like I'm not using any earpiece to listen to their lung sounds, I've had several comments that they think it's cool.
Just wanted to let you know there are alternatives out there, and I strongly recommend going to Voc Rehab.