For all those with constipation

Autumn
I'm currently 6 wks 4 days. I am on high does of iron which can't be avoided. The doctor prescribed me stool softeners but they aren't working I've been on the two days I haven't gone in four days and I'm at the point that I really need to go even if it's just a little. Do any of you have any tips I could try? I greatly appreciate it!!!