How Can Chronic Constipation And Abdominal Cramps Be Treated?

I ve been constipated since childhood and had symptoms of IBF for many years but it seems to be getting worse. Before the symptoms would last 3-4 weeks and then go into remission for a year or two before returning. I ve had these symptoms almost every week now for the last four months: constipation (as always), abdominal cramps, bloating and gas, and at times, stomach upset that lasts several days. I ve had the same symptoms for the last two decades, but as I said, they are getting worse. I m under terrible stress from work and financial difficulties, which I know may exacerbate this condition. Any feedback would be appreciated. Thank you.