Probably TMI/ fybogel

Sooo I’ve been constipated (which was a new symptom for me) so I decided to try using fybogel after taking two then one a day I finally went to the toilet fairly easily. But I figured I’d just keep taking one a day since it’s not supposed to be super potent like some laxatives. Well I was WRONG. I shouldn’t have kept taking it after going because I had the worst diarrhoea/ stomach pain. Any of you ladies had this? Or should I have stopped taking it after I actually had a BM?

Also it’s not going to harm the baby is it?