What do Brixton hicks feel like?

Just wondering what does Brixton hicks feels like? Not sure if it’s what I’m experiencing. I was up last night with a poorly tummy (💩) and most of the day today Iv had such a sore tummy. Iv done my bits of cleaning and running around after my other kids and the pains seems to have move now to my sides as well as just across my bump. It comes and goes and is just a soreness type pain 🤷🏻‍♀️ wouldn’t say it feels like contractions though these are more sore. I don’t think Iv experienced this in my other pregnancies? Thoughts? Currently 30 weeks....