Such suddenly appearing blisters can be due to either bacterial infection like bullous staph infection or viral infections like shingles. The first sign of shingles is usually a tingling feeling, itchiness, or stabbing pain on the skin. After a few days, a rash appears as a band or patch of raised dots on the side of the trunk or face. The rash develops into small, fluid-filled blisters which begin to dry out and crust over within several days.
I suggest you to get it examined from a dermatologist and get an examination done.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your dermatologist. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
Thanks for the assistance. I've went for a bullous pemphigoid and Porphyria cutanea tarda tests but both came back negative. I finally managed to get an appointment with a dermatologist this week. Will keep you posted