Hello all,I've been reading this forum for a few days now and decided to post. I'm new to the site, but definitly not IBS-D. I started having stomach problems when I was about 15 yrs old. I was constantly spending time in the restroom and realizing things like soda, ice cream, and all those yummy things you enjoy as a kid was causing me A LOT of issues. I started taking 2 imodium pills twice a day and thought there was seriously something wrong with me because I never became constipated. I saw a few doctors back then, but IBS wasn't really well known as it was today so I was told I was lactose intollerant (which I wasn't). Anyway, my mother and grandmother went through all the GI tests years ago and the doctors never found anything which is why I never went to see a specialist. I lived the past 10 + years just trying my best to watch my diet and to keep an eye on the bathrooms no matter where I went. Well, I'm now at the point of my life that I want to take control of this! I'm 29 yrs old now and before I hit the big 3-0, I want to get a better understanding of whats going on and how I can control it better. I still live on my liquid imodium and eating as bland as possible, but I still get these annoying flare ups where I spend my days in a bathroom. So I guess what I want to know, is what type of tests do they commonly do to diagnosis this? Blood tests? Endoscopy?