A.J.
*big hugs*
I'm having trouble with low blood pressure right now from a new prescription I just started and it sucks. I understand your fear with dropping your daughter or blacking out. I fell in the kitchen this morning and woke up seconds later to my kiddos asking if I was ok.
Up your calorie intake, always have a snack and bottle of water by your bed to take BEFORE you stand up, ask your pharmacist to run a prescription review on the meds you are taking to make sure that they aren't causing low blood pressure and dampening your healing process.
If you continue to breastfeed which is best for your baby, then you will continue to have a hard time bouncing back without help. There should be something your doctor can do to help. Is it too late for a transfusion? It may help speed your body's natural defenses.
I've also heard that drinking aloe vera juice helps. Again, ask your dr but I know the bottle doesn't list any warnings about taking while pregnant or nursing and most of the stuff at the health food store does.
Good Luck!