Thank you for your query.
As you have stopped night feeds of your son he seems to be disturbed. It is very unlikely that the rash
or gas are the problem. I suggest that you let him latch for breast feed which shall comfort him.
Try giving your son some solid food before retiring so that his stomach is full and would not demand a feed at night which shall help you in weaning him off the night feeds.
In case the above methods do not work then you should consult your doctor so as to know if anything is amiss.
I hope I have answered your query to your satisfaction.
Wishing your son all the best.