Currently 32+4 with my first. I've been getting Braxton Hicks contractions for so long that I genuinely can't remember when they started, but it was around 16 weeks or so, and by 20 weeks they'd become very regular. Like "all the time, a constant present in my life" sort of regular. They didn't hurt at all at first, and honestly I was only aware of them when lying on my back, as then I could see this hard little lump of a uterus, and feel and see my pulse strongly. I called triage about them a couple of times and was told just to keep an eye on them. I mentioned them to my midwife every time I saw her, and she said it was because I'm so thin (I'm not particularly thin, before pregnancy I was a size 10 and weighed something like 58 kg 
).
So I thought "okay, obviously it's not a big deal, just get on with it", and I have done, but honestly they've just gotten more annoying over time. Since maybe 28 weeks they've started to hurt - not severely, just a tense ache across the top of my bump - but they can easily last 10 or 20 minutes or longer, or be shorter but come every few minutes, and this happens all day, every day. It's somehow exhausting. I went into the day assessment unit last week for foetal movement concerns (baby was fine), and the womb hardness monitor (whatever it's called) showed regular, strong contractions about a minute and a half long, about 3-4 minutes apart. It doesn't mean I'm in premature labour, the midwife said, just "gosh, that is a VERY irritable uterus!". Uch. It hurts. It's tiring. It interferes with me feeling baby's movements (it's probably why I had to go in in the first place). I want it to stop.
And the most frustrating thing about it is how little research and information there is on it. I've trawled Google Scholar for "irritable uterus" and every other combination of terms I can think of. There is hardly anything. One paper says that it slightly increases the risk of premature labour. Another that it can be caused by infection, which I don't have, or dehydration, which I don't have, or constipation, which I probably do have but not to any sort of extreme level that would explain why I have to put up with these constant contractions and the millions of other constipated pregnant people out there don't. And that's about it as far as the entire scientific community is concerned. No one's that bothered, apparently.
I guess I should take comfort from the fact that no one professional seems to care, since that must mean it's not particularly dangerous or harmful. I do believe that. I'm not particularly anxious about this, just fed up with it. And I do worry that while it might not be hurting baby exactly, it could still be an unpleasant experience for her having the walls of her home always clamping down like that.
Thank you for reading. I'm not posting this expecting advice really (though if you have a cure, please tell me!), just want to have a moan and perhaps find some solidarity, because while DH is suitably sympathetic it would be awesome to commiserate with anyone who might have experienced similar.