Sounds like you have two issues - wind and reflux.
Regarding the wind, are you using expressed milk in bottle, or formula? If expressed milk, my girlfriend had overnight success with stoping colic in her baby by stopping HER consumption of all dairy food (ok, it's only a sample size of 1, but its an example all the same). If you are using formula, the first thing I would do is change that - I would go for Aptimil (we formula fed from 6 to 12 months, and that is what I personally thought was the best one). If that doesn't work, I would try a soy-based formula, to see if it the cowsmilk base that is upsetting the little chap.
In respect of reflux, there are degrees of reflux from quite mild to quite severe, with different ways of treating it depending upon the severity. Also, IME HVs will try to "fob you off" with the "don't worry, he'll grow out of it" line, which is small comfort when he is screaming his little lungs out at 3 am. So, suggest a trip to the GP rather than the HV, and outline your concerns. You can buy "over the counter" infant gaviscon in the first instance, which you mix with formula, or give via a spoon/syringe in the mouth, which works the same as adult gaviscon by forming a little floating top on the stomach to prevent the acid coming up into the throat. If he gets relief from that, you more or less have the answer yourself. Also, if you ask the chemist, they usually have over the counter "reflux" formulas which are thinking that the normal type, and therefore in theory, stay down. None of this worked for us, and we ended up at the paediatrician who prescribed Enfamil AR, which has to be said, was the answer to every 3 am prayer I've ever said!
Good luck