Hi there. I just wanted to give you an update as to our situation since they're the same age...
After about 3 months of weirdness ( night wakings, two colds, one ear infection, crying for us when we put him down for bed, night fears, needing to go pee once or twice in the night, taking over an hour to fall asleep)...... I think we might be past it. Don't want to jinx it, but he seems to have settled down finally. I hope! It's been about a week.
We tried everything... Went 4 days in a tow with no nap, earlier BT, bit later BT, etc.
What happened as of now, is that his whole schedule took a later shift. Nap is later and capped at an hour, BT is almost 9pm (yikes!!!), and WU is around 8am.
I'm pretty sure we're on the last leg before he drops the nap, once the above new later schedule goes wonky again. So, in order to keep this last nap awhile longer, I've accepted the later and shorter night, and everything else. I fought it for awhile, wanting him to have an earlier BT and longer night, but once I gave in and realized he was actually UT for naps and BT and went with that, it's finally calming down.
The 4 days with no nap he actually did ok, but BT and WU were too early and he wasn't extending his night, so I decided to go back to giving the nap. He never refuses it, it was just making BT hellacious, and I think contributing to the NWs.
And a huge part could have been a weird phase.
Anyway, I hope you see things getting back to normal soon. I think with regard to night fears, just continue to offer reassurance and it will pass. We just always comforted him in his room, never in ours. A lot of middle of the night holding and rocking and telling him we were always here. Don't worry about it becoming a habit. Once you see the fear pass, you can get a little more strict.
Good luck!