RE: Back off the poundage or build back up?
I wouldn't buy anything right now. Just turn the bow down to 60# and enjoy shooting. If you can't handle 60# easy enough you may want to change limbs. If your strength returns, crank it up slowly until you are comfortable. If your strength does not return to a suitable level make a choice then. I like to be able to hold my bow at full draw for about 2 minutes (on a timer) and then make an accurate shot at 20 yards. Don't shoot more than every other day if you want to build strength. Good Luck