good sleeper vs bad sleeper

so i have an almost 10 month boy. and right from the beginning he was a great sleeper. put him in his crib at 2 months old and he started sleeping 12 hours a night.. the last few months have been gone to bed at 8pm wake up at 6-7am drink a bottle and back to sleep for 1-3 hours. all of sudden the past 3 weeks have been up almost every 2 hours every night.. anyone have this happen and anyone have tips?? im assuming its a growth spurt and teething since in the last 5 days he had 2 teeth pop through