I'm sorry you're on bed rest!
I know how hard it is to let people take care of you, but remember that this is about your health and the health of your baby. Let people help you and try to enjoy it.
I'm only supposed to get up to go to the restroom, take a short shower and I'm allowed to make myself a quick lunch while my husband is at work. I do occasionally cheat, but I always regret it.
Talk to your doctor if you're unsure about anything.