Second Trimester Constipation

Not trying to be TMI here but I am 19 weeks and this constipation hit me out of no where. I have really never had any issues with going, not before pregnancy and not this whole time until now. Does anyone have any advice on how to relieve and/or prevent this? I don’t take any iron that would be causing this either. I’m already taking extra magnesium Glycinate at night (total of 310 mg) but idk if it’s safe to increase it all that much more. UGHHH TYIA 🤍🙃😂