My 10.5 month old has never slept thru the night. nursing and is used to cosleeping but tried starting in his own bed last 2 weeks, he wakes screaming throw head bk arching wont take binky or nurse and seems in pain. food allergy? gas? teeth?

You trained him to co-sleep & this is the result. Try training him to self- settle by reading/sitting near him as he goes to sleep. Gradually move from close to more distant. When he acquires the ability to self-settle to begin sleep, he can do so during the night when his sleep cycle briefly wakes him. Do not nurse him down or use a binky. Neither promote self-settling success.