Bad sleeper

My son will be 6 months on the 11th and has gone from a great sleeper to a clingy little monster Any other mommas dealing with babies who only sleep 20-30 minutes when they aren’t held or right next to you? My son was a great sleeper but then he started teething then the 4 month sleep regression that we never recovered from now more teething and the 6 month sleep regression 🙄 if I let him sleep in my bed with me he’s fine he’ll sleep all night he just latches when he gets hungry but if I put him in his bed he’ll sleep for 30 minutes max and then he’s up and screaming till I pick him up snuggle and nurse him. I’ve tried the cry it out method and it worked well for the 1st week but now he will just scream and cry till I pick him up I do 5 minute intervals for 30 minutes soothing him with a pat/rub and kiss every time the timer goes off. I’m just exhausted and want my little one to be able to sleep on his own not just in my arms or on my chest or bed 😔