I went to the chemist yesterday as Ive been suffering constipation for the last couple of weeks & they were really helpful.
They said to eat heaps of fruit & vegies (avoid bananas), drink lots of water, orange juice or apple juice. And prunes if you can stomach them. Take a fibre suplement like metamucil (they make fibresure which is really good)
and they gave me some Coloxyl and said to take it for the next 3-5 days
As for abdomen & back pain, Ive been using heat packs