Contractions!

LJ • 1 baby girl with another baby on the way
For those of you have been in labour before, can you explain to me what your contractions felt like? I've had minimal braxton hicks, to be honest I think honestly I can say I've felt like 2, I'm 39 weeks on Monday and hoping something will happen for me soon.
Today I got some pain across the top of my stomach it felt very tight and almost took my breath away. There was nothing regular and it was only a few times so I'm thinking it was more in relation to my baby moving but it's left me curious of what other ladies have felt and what I should expect? Anyone like to share their experience :)