We were just talking about this recently. I take Ibu, too, and it does cause bleeding. My doc recently encouraged me to use ibu or Alleve, but I question her advice because I am anemic and my bleeding resembles periods, but it's abnormal. I was bleeding with some pain for four weeks last month and using ibu that long could cause serious damage. Plus, I need all the blood I can get so losing just a little each time I take a pill is too much.
For most people, this probably isn't a huge concern. If you are worried, search for Ibuprofen and GI bleeding.
I have started using heat to help with the pain. I have a heating pad in bed and I purchased those 8 hour heat patches that fit in your clothes. They are a little more expensive than pain pills, though.
Total abdominal hysterectomy at age 26 due to abnormal bleeding. Kept ovaries.