Teething Question (13 months)?

I went to the pharmacy to ask about pain reliever for my one year old. She's been cutting some molars for a few days and it's really been rough on sleep. She isn't napping, and at night wakes up every 2-3 hours once orajel and tylenol have worn off. I asked the pharmacist what she recommended that might help relieve the pain for a little longer, and she suggested benadryl, since my daughter also has some congestion as well from the teething. She also told me that 13 months is too young for molars? I don't think this is right but I'm curious about how old your kids were when they got their molars.