My puppy is peeing everywhere after hypoglycemia. What should I do?

Hypoglycemia can be life threatening. I hope she has recovered now. To keep this from occurring again it is recommended to give her Nutri-cal supplements every 4-6 hrs in between meals
An illness like this can understandably set back a pet in their house training. So go back to your basics with her training. Taking her outside regularly (a puppy has to urinate for every month old they are plus one in hours, so a 4 month old puppy can hold their bladder for 4+1=5 hrs at a time), reward her when she goes outside, and learn to tune into her cues that she has to go. Also it is best to crate train her and keep her inside a crate (only big enough for her to turn around in to discourage her from eliminating in the crate) when you are not home to supervise her and also at night. She should be back to normal elimination soon enough.
Also make sure that you are paying attention to how often she is urinating. If she is going more than once every hour then there is a good chance she has a UTI. Also the urine can have a foul odor to it. If this is the case then she needs antibiotics from your vet to clear up the infection, which should in turn decrease her urinary accidents in the home.