You can take a laxative while you’re pregnant. It will help with the constipation but before that just try drinking a bunch of water and it should flush you right out. I’ve only had to take a laxative twice during my pregnancies and it’s because I eat a lot of iron rich foods and I have a lot of iron in my prenatals cause I’m anemic so I get constipated easily because of too much iron so I drink a crap ton of water!