So my son will be 5 months and 3 weeks old tomorrow and last night he woke every three hours and he…

So my son will be 5 months and 3 weeks old tomorrow and last night he woke every three hours and he hasn't done that since he was 2 1/2 months old he has been kinda cranky and just not hisself could he be teething I tried calling his doctor but there phones are down right now FTM idk what to do or look for