Constipation/ER visit

I went to the ER tonight for severe stomach cramping that wouldn’t stop. Felt like I had taken several laxatives. Made me throw up it hurt so bad. Got a CT scan and I’m very constipated. Luckily my attending physician also has mcas and he explained to me how constipation and mcas works, how it can cause intense cramping, and cause flares, etc. which could be why my safety foods are turning on me. I’m also malnourished so I’m sipping potassium.

What do y’all use for constipation that won’t cause a reaction. (I know everyone is different). ER doc said an enema might be my best option since it’s quick and localized.