Stressful weekend ahead/ what about epsom salt

I did the B&P for a few days and it resulted in constipation. I know now that was probably due to my not taking in enough water. I was so blocked I used Senna a couple of nights ago and have been going to the bathroom constantly, but just for one little piece of feces at a time. I am facing a stressful weekend with hosting two sides of a family that don't quite get along. I need to be able to function without going to the bathroom every ten minutes to expel such a small amount. What is anyone's opinion of my taking Epsom Salts (alone) tonight and letting it clear me out?
I ate fats today so can't do the Liver Cleanse. Just need to excelerate the movement. Thanks in advance. Tweet