Sorry that you are feeling so down.
I'm another who can't take the bcp. I blow up like a balloon, feel wierd and disassociated on them and tend to bleed, and have increased pain. Not good. Even in my teens when I was first put on the pill for bad periods I could only take the v low dose ones which have since been associated with an increased risk strokes etc.
I can't say whether the inscision in your uterus has caused longer period, your surgery and the spatula they put into uterus to move it around, or the pill , that is leading to the long period.
I am also lactose intolerant and can only take a little wheat ( doesn't need to be in wheat free environment but can't eat eg bread etc ) . I am currently 29w pregnant after several cycles of de ivf and they won't investigate until my hormone levels have settled but they say it is unlikely to go away as started before I conceived. Have you had any investigation done to rule out inflammatory bowel disease?
I was v hopeful that , if I could get pregnant again, my symptoms would improve as I have 4 year old twins and during/ just after that pregnancy is the best I have felt in the last time 10 years. I have had more surgery and lots of drugs since my symptoms worsened again which made no difference so it was the light at the end of the tunnel ( plus I wanted more kids )
However, this time there has been no improvement during my pregnancy, and my bowel problems have got worse. I felt as if my last hope had been taken away.
I have done some looking into dealing with chronic pain. While a lot of it is aimed at sufferers of back pain and not really relevant to endo sufferers, there are some gems.
I am trying to look at the positives in my life. Enjoy the little things. It sounds twee but the autumn leaves, the frost on the grass etc.
I am trying to accept I have chronic pain and it won't get better. I get scared sometimes thinking about the futre re work etc, and angry when I see others at my work with the life I should have if I hadn't got endo. I try and accept these as normal feelings and not dwell on them.
I hope you can get some info from your consultant re exactly what was done . If they haven't investigated the bowel problems get them to. Ok it may just be endo but it may not. Meanwhile lactose free milk, yogurts ( yummy frozen ) and lactose free cheese have been a godsend for me. You can also buy lactase tablets which mean you can maybe have an occasional treat out ( tho I have never tested with more than a bit of double cream on a wheat and dairy free cake. I have also found things have improved a bit since I started drinking peppermint tea.
I am also waiting an appt at the chronic pain clinic. However , it is apparently a long waiting list.
Sorry for the essay, but i just wanted to let you know that you are not alone. I hope things will improve for you over the next few weeks and months.