8.5 month old not sleeping very well

Kristina

My baby boy for the last 3 to 4 nighys has woken up between midnight and 6 am several times a night just crying until I pick him up. Normally he sleeps through the night pretty well. I noticed that his top gums look swollen, could it possibly be teething? He didn't do this when he got his bottom 2 teeth. I'm not sure what to do anymore and I am losing sleep.