Hi thank for your question
Your problems are:
Lower abdominal bloating
Occasionally bright red blood from your rectum (P/R)
Thick uterine line and 2 uterine fibroid
on ultra sound
in your abdomen left hypochondrium
Thick uterine lining along with uterine fibroids in 52 years old lady is sufficient indication for D&C.
Occasional bright red blood from rectum is indication for sigmoidoscopy
rather than colonoscopy
,but since your also having abdominal swelling and bloating, so this makes colonoscopy necessary.
You can go for all the three procedure in one setting
All the three procedures are not so big, so go for all the three in one setting,that will give you cause of bleeding P/R.Rule out cancer in your uterus and get rid of lipoma.
Hope I answered your question.