Colic in baby...What else can I do?

My son is 5 weeks and I have been giving him Infacol for 2 weeks now... at first it seemed like was working but for the last 2 days he has not been burping much and keeps on farting... I know this is good as he is getting the gas out but he wakes him from his sleeping farting and seems in pain with it...he is going to the toilet well...all in one go...what else can I do for him. He is bottle fed (Aptamil 1) I gave him milk that isnt too hot at first but then starting to warm the milk up more and find that he is being sick what is best to do? Help! x