Is it possible to stay overnight post Breast Augmentation? I feel I would be too worried without medical help following surgery.

You can see if there is a facility in your area that offers "aftercare" for cosmetic patients if you are concerned about your recovery.  Also you may inquire if there are any private duty nurses that can spend the evening with you. Good Luck

Yes, it is. Best to discuss your options with your plastic surgeon. There is an additional charge for overnight stay.