3 pregnancies and suffered every time, right up until the very end. But the moment I was no longer pregnant it was gone! So bizarre.
Anyway, I went round the houses finding things to work but if you want something quick and effective without having to eat high fibre foods all day, drink a glass of Prune juice in the morning on an empty stomach. It's not nice but down it and wash it down with some water. I found drinking it at room temp was the easiest way to down it the fastest.
I toyed with eating prunes, weetabix, Chia seeds, kiwis, etc etc - which all work to a certain extent, but I was fed up with having to alter my diet so much (when I already eat a very balanced diet with a lot of veg). If I ate another Prune I was going to throw myself out the window. So, I downed a glass of Prune juice every morning which helped keep things moving. Sometimes I'd still struggle, so I'd have another glass in the afternoon while going through a rough patch.
Also - drink as much water as you can throughout the day, this is essential!!
Good luck, I really feel for you.