Toddler melatonin

Hey mommas, I’m embarrassed to ask but what’s the best melatonin brand that helps your LO. I started working night shifts (10pm-6am) and my son falls asleep super late (2am) he has been keeping my husband up till then and he leaves as soon as i get home in the am. He gets a bath every night. Etc.. nothing helps, he falls asleep some days at 8pm then wakes up at 12am. No naps during the day. Thinking he just misses me so he wakes up. (It started after i started working)