As well as your HV, check if you have any local drop in centers, I've got a few around my area, where I can go and get baby weighed and speak to Hvs and MWs about any concerns x
They might have a breastfeeding team / lady they can send out. In my area you get a text from them offering support and they will come out and see you, help with latch and position etc. Or like others have said the local family hubs/centres might have a drop in session x
My hospital had a breastfeeding team you could call anytime, I’m sure there is also an online thing will see if I can find it for you x
In my area they have an infant feeding team. Worth googling that term together with the borough you live in. If not then call HV and ask Also you may have a local la leche league meeting nearby, you can check on their website
You should be able to speak to your health visitor with any concerns for baby. Their contact details should be in your red book, they also usually have drop in clinics x