DS has fairly STTN since about 4 months old. But as soon as he hit 12 months it's like a light bulb went on and he's up once or twice a night. And crying. The only way to calm him is if we give him some milk in a bottle and then he'll go back to sleep. This has been going for about a month now and it seems like the new normal - ugh. I haven't been this tired since his newborn days - is this something to be concerned about? I've read that kids at this age start to dream vividly so they can get freaked out and try to figure out dreams vs. reality so I'm not sure if this is the case. Any tidbits or advice from other mamas out there? Thanks

P.S. he has transitioned from 2 naps to 1 and he'll take a solid 2 hr nap in the middle of the day. He goes down around 7:30ish, wake up around 11 and then again around 3 or 4. He's up for the day at 6 or 6:30.