10 weeks - constipation

Ladies. I need advice! This constipation is killer. I've had it since about week 7. I've only had 1-2 bowel movements once a week and it makes me feel awful. I've been taking stool softeners. There have been days I've been desperate to go to the bathroom that I've taken milk of magnesium but the last time I took it, it made me nervous cuz it gave me what felt like contractions. What has worked for you in the past? I've been good about my diet - drinking tons of water and making sure I make healthy choices to help. I've tried drinking prune juice- that almost made me
Vomit. HELP!