Please help my 10 month old won't sleep?

My son won't every sleep! Every since he was born he's been getting up ever 4 hours for a bottle then wakes up at 5 and thats him up for the day! he rarely goes down without a bottle. He has a nap in the morning a small nap i the afternoon and i try to put him down bout 7-8pm which worked ok for a while (he would then wake up 11ish then 2ish then wake up at 5am) but now as soon as put him in his cot he wakes up screaming! he ghets himself into such a state he's almost sick and hits his head of his cot if i leave him to cry for too long! i dnt think i can cope with this for much longer :( i know its my fault as during the night when he wakes up he tends to sleep in in bed with me so hes prob just scared to sleep on his own. he is teething atm and i give him calpole but i've never seen a baby get into such a state. what can i do to help him?? i left him to cry last night and he cried for 2 hours! please help xx