C.D.
I'd check w/the doctor and make sure they listen to you and don't just brush it off. It could be minor, but treatable, if it's gas, reflux or yes, teething. Those buggers hurt! I never found Orajel effective, and there are concerns about using it because it can numb their gag reflex.
I gave my kids Ibuprofen, as it's meant for inflammation, which is what teething offers - inflamed jaw and gums! Tylenol helps, but I found Ibuprofen more effective and it works for 8 hrs. vs the 4 of Tylenol, so they could sleep longer. There may be an issue w/giving it to babies less than 6 mo. old, so I'd ask the Dr. if it's OK, because they can base it on weight. I actually had to use Rx med w/higher amount of benzocaine than what OTC Orajel offered w/my son.
Good luck!