extreme constipation (tmi)

I'm in misery. It's been almost 2 weeks since I've been able to go. I went in the hospital once with the help of Senna. When I came home I was taking a generic brand of softner and thought I'd be okay because I was drinking TONS of water. So nothing happened .

Yesterday I tried to pass a bowel movement and thought I was going to literally die. Sent my boyfriend to get my Colace and Senna, didn't work. Today I've been in so much pain that I can't concentrate on my baby so I called the on call OB. She suggested Fleet enema, Miralax and Magnesium Citrate. I purchased them all today. Does anyone have experience with the enema, I'm really scared to do it and my rectum is irritated but I feel like it might be the only way to clear this blockage so I can finally go!! Please share your experiences and some advice, I.actually in tears, this postpartum poo MUST go 😔