{{{HUGS}}} The way you are feeling is entirely normal...not that that makes it any easier, but you're not alone in what you're experiencing. Losing a baby, even one this small, is still a loss. Give yourself time to grieve and recover from your loss. Take things one step at a time. Right now your emotions are extremely raw. Time will give you healing.
I wouldn't think you'd need hormone replacement therapy, since you have a functioning ovary still. Your doctor can tell you more. When do you have your post-surgical appointment? It sounds to me like your doctor has left you with a lot of unanswered questions. I'd suggest that you write them down so you don't forget to ask anything when you're at the appointment.