{{hugs}} Gemma! You sound so much better already!
Glad to hear your GP was receptive to your concerns.
You asked about where to start calling. I'm US, so have limited info for you, but as for UK helplines, Emma (was a bf mod here for years, trained bf councilor, etc) usually recommended one of the first 2 to start, but I can't remember which.
It would be one of these:
1. The NCT (National Childbirth Trust) Breastfeeding Line: 0870 444 8708 - 8am-10pm everyday.
2. The ABM (Association of Breastfeeding Mothers): 08444 122 949 - open from 9.30am to 10.30pm every day.
{{hugs}} again. So glad Kurt is eating for you again.