I have a little boy who is 10weeks old. until now i have been exclusively breastfeeding, sort of on demand but not letting him go more than 3 hours without a feed except at night. his weight gain has never been as good as hv would like and has gained an average of 3-5ounces a week. i feed him from both breasts at each feed and AM NOT dieting/restricting my calories. i didnt have him weighed last week cos he was a bit poorly (chesty cough, bit miserable but no temperature) so we stayed home in the warm apart from to go for his first lot of jabs (which made him even more unsettled).
anyway today i go to get him weighed (for the first time without dp, so feeling a bit nervous) and he weighs the same as he did a fortnight ago. hv asks me if im dieting, i say no but he has been a bit poorly. she tells me (again) to up my calories. she weighed him twice, which he didnt like, started crying while i was talking to her/getting him dressed. she said she thought he sounded like he was crying cos he was hungry (i told her id fed him only an hour before). then she asked if i would feed him so she could watch as he has now dropped from 75th c at birth to being on the 9th c so she is quite concerned. i tried to feed him but he was still crying and wouldnt latch on or settle, she tutted and said it was because he was getting fustrated by sucking and not getting any milk, and was it usually like this (its not). in the end she arranged for a hv to come see us on friday to make sure he is putting on weight cos if not "we will have to do something about it".
i had to take off my wrap id carried him there in to feed him and had to put him down to put it back on. he screamed blue murder the whole 20mins i was there and i left feeling like a total failure with what seemed like the whole room watching me unable to calm him. 
i have been out and bought some formula in my despair and he has had 3 formula feeds and 2 from me since lunchtime as i really want him to put on weight. I really wanted to breastfeed until at least 6months ish and now dont no what to do as his weight gain has never been on track and i cant help wondering if he would be better off being bottle fed from now on. i have no idea how to to combi feed temporarily (if that is even possible) without making my milk supply drop.
all advice is really appreciated. sorry for the long post, didnt want to drip