My one year old is no longer sleeping through the night

For 6+ weeks, ever since he turned one and we switched him off formula, my son isn’t sleeping through the night anymore.

We took him off the bedtime bottle and he’d fall asleep fine but then wake up and scream until we relented and gave him 4 oz of whole milk. After two weeks of that, since he’s an incredibly picky eater, our pediatrician told us to just give him a bedtime bottle again, so now we do and that worked for like a week, maybe 10 days.

He has been cutting teeth - a molar, a bunch of others on the bottom, so we give him medicine at night if he’s had a very drool-y day. Lately he cries out in his sleep for like 1-3 seconds about 6 hours after the dose and then won’t fall back asleep until we give him more.

He has been sick - a few colds in a row, which we finally seem to be past, and that made stuff tough for a while.

I don’t even know what I want from this post. I’m just really tired. I keep snapping at my husband out of frustration and exhaustion which isn’t fair - plus, he’s tired too.

When does it get better? How bad is it that we’re still doing a bedtime bottle at nearly 14 months? What worked for you?