No sleep

A

I know there have been posts about this, but I need to vent. My little one no longer sleeps good at night. Its been.2 months, maybe more since he’s slept through the night. I don’t know what’s going on. I’m so tired. Some nights it’s every 2 hours and when he wakes up he just stands so no putting himself back to sleep. He wasn’t even this bad as a newborn. I’ve tried everything. Sound machine, putting him down earlier, dropping a nap during the day, teething gel, teething tablets (with sleepy stuff in them). I don’t know what else to do. Help!