Yeah, lonliness is not fun. I had my mum around for awhile but mums tend to get bossy & generally annoying.
We live in Switzerland, in the countryside & there were no support groups (they're starting to happen a bit more these days, especially among the expats) and my friends (all from work) were kind but clueless and very, very busy! It was only when dd started nursery school that I began to make mummy-friends, which is a long time to wait.
I'm sure it's easier in the UK. Do you go to prenatal classes or prenatal yoga? That's a great way to meet good, good friends - very easy to bond when pg, esp for the 1st time.
If all else fails, we're here for you!