My 5 month old boy is exclusively bf. He has always fed every two hours 20 minutes to half and hour on one breast each time. He has been ill with bronchiolitis and in that time i had to express milk as he couldn't feed. Now two weeks after being ill he will feed but only for about five minutes at a time and when I try to offer him more he will arch his back and push away.At first i tried feeding him little and often but this didn't work at all he would scream every time I offered him the breast. I would make sure he hand no wind and try him again but still the same. Now i try every two hours and he will do exactly the same, feed for not even five minutes then pull away and not latch on. He doesn't moan or wine as if he is hungry but i am obviously worried he isn't getting enough. He is more interested in sucking his thumb! Any advice would be grateful.