Sharp pain in left side-Is it associated with my other digestive issues?????

Funny enough, I have had a lot of problems with my digestive system, and I was allergic to milk when I was a toddler, so someone suggested that I quit drinking milk for a while and see how I feel.  I was also feeling really sick everytime I ate something sweet, but was told I wasn't having problems with diabetes, even though it runs in my family.  I switched all dairy to soy, or veggie substitute products, and I eliminated sugar from my diet, and subbed it for splenda when necessary, and I have felt much better.  I wouldn't suggest it for everyone, I'm sure its specific to my problems, but I haven't had to take any of my medications for a couple of months (i was taking 9 a day at one point-seemed like a lot too me), and I have lost some of the weight that I put on as a child.  It's amazing how those two changes have been such a help to me.  I still have some issues that I am working out, but overall, I feel like I spent a lot of years really struggling and I am finally on the road to recovery!!!

I will be 24 in two weeks. I was walking 3-4 miles a day last summer, and I felt pretty good at first, I had a lot of energy-more than I've had in years, but after a while I got back to where I just felt bad, and I couldn't drag myself out of bed.  Unfortunately, that's how I have spent most of my 20's- at work, the doctor, or asleep.  (Beginning to think I may have some kind of sleep disorder) I am feeling much better though since discontinuing the milk and sugar, and I notice a clear difference if I do have sugar especially.  Within 10 minutes of eating sugar I am very nauseas.  The milk I notice, but not until I realize I haven't had a BM for a longer period of time than normal, and this usually corrects itself after I have had soy milk-strange how it works that way!  I don't eat a lot of fish, I have a weird thing about fish scales, and I really don't eat a lot of red meat because I have a hard time digesting it-it's one of those foods that sits in my stomach until it becomes painful.  I eat chicken a few times a week, and occasionaly have something like tofu, eggs or peanut butter, but I take dietary supplements to help make up for what I'm not getting from meat.  I'm more of a plant person.  I eat cereal for breakfast w/ vanilla soy milk, have a fruit salad for my morning snack, salad with or without chicken for lunch, and whatever my mom cooks for dinner, but she cooks very healthy, because we have some different health problems in our family.  The only real development I've had with my health lately is that I'm apparently grinding my teeth in my sleep.  I've been having bad headaches, and some pain in my gums and my jaw, especially the right side, but I have plans to call my dentist about that this week.    Keep me updated on how you are feeling.