i have been suffering from bulimia and anorexia for about seventeen years so much digestion system is completely messed up. the docctors try to help with the digetsion but nothing seems to work even though i do eat fruits and vegetables. i am not a junk food junkie. i rarely eat junk food.

"my ed started after i lost weight from an infection. i couldnt eat much and after i recovered from the infection because of Antibiotics "

Have you considered the fact that your constipation isn't really related to your ED then, and maybe more the infection and Antibiotics ? You might benefit from a really good Colon Cleanse and a parasite cleanse. Antibiotics tend to kill all the good bacteria and allow for parasites to enter your body. After a few months they can colonize your body as they breed and mess you up.

I'm assuming you drink enough water too, right? 8 glasses a day? No processed sugar, and lots of fresh fruit and vegetables?

you need 35 grams per day. apples are high in fiber. there is also fiber pills/mixes. drink ginger tea and keep taking probiotics for 8 weeks at least.
ginger tea will help tone the colon,keep you hydrated. it takes at least 8 weeks for muscles to start to respond. but always eat at least 35 grams of fiber. you will need a bit more water if you take dry fiber as oppose to apples etc.