Hi and welcome, everything. I had something similar at 24 weeks with my first baby and ended up on bed rest and in & out of hospital for the next three months. They did a fetal fibronectin test which was positive so had to take the tightenings more seriously than they otherwise might have. Hope yours settle; they're not much fun! It helps to think of them as getting your uterus into shape, I've found. 
Good idea to have a breastfeeding consultant come to visit. Like ODog, I wish NCT and others would paint a more realistic view of how breastfeeding feels and how much work it can be, but maybe they don't want to put people off. I found it so rewarding, though.
Hope you had a lovely time outdoors with your DS, ODog. Have his nappies settled?
Just back from visiting my osteopath - without the girls for a change as a friend could come look after them; osteo seemed a bit sad not to see them! She did some more acupuncture and I can tell you it's really weird to have a couple of needles stuck into your mons pubis. Am quite sore now so it's takeaways for dinner tonight!