I'm so sorry to hear that!!! Have you ever noticed these bumps before at all before the meds?? Definitely reach out to your Dr and let em know what's going on. I'm on gabapentin also twice a day and I've had these bumps appears on the palms of my hands and some part of the bottoms of my feet 😥 dr said its something called like bullous pemphigoid. They go away on their own but sometimes need the steroid creme to knock em out. They always usually come when I'm in a fibro flare or have eaten something my body does not like❤️