I was wondering if anybody could suggest some low fat, high calorie, gluten-free, vegetarian foods. I'm complicated, I know.

life has been severely stressful as of late, and outlet has been darling stationary bike. Nobody, including doctor, has any issues with me exercising to stay sane. The only issue with this coping method is that it creates a need for approxamitely 3500 calories or so per day to maintain weight of 120 lbs at 64.5' tall. I lost 6 pounds rather quickly after bike was fixed and I began using it again. I rode it for 17 hours last week and about 15 the week before on top of walking to various places in neighborhood, weight lifting and yoga. I was eating about 2500 calories each day, which is what a dietition had suggested (just going off of me saying that I'm very active...no details. People that know exatly how much I do consider me to be severely active), but this obviously wasn't enough. According to the online calculators that I've found and according to own experience, 3500 is a more accurate requirement.
mom is worried to death about me, as I nearly died ( heart even stopped for a few minutes) as a result of malnutrition earlier in life. I had had a bad gallbladder that went unnoticed for over two years and caused body some major trauma. First, I gained over 30 pounds in a couple of months while eating pretty lightly and being moderately active, followed by an even faster plummeting of pounds after I began experiencing gallbladder attacks. I ened up at 76 lbs in early 2007, came close to dying on more ocassions than I'd like to count, and spent 3 months recooperating in the hospital. Needless to say, mom never wants to have that happen again. I don't want to make life harder than it already is for her ( grandmother--her mother--is currently suffering with a slightly hopeless case of breast cancer along with MS and Lymes disease and a kidney/blood infection) and I want to be healthy. I've been feeling fatigued and worn down, I've been waking up in the middle of the night absolutely RAVONOUS, stomach is bloating up whenever I eat, and I've been suffering from random spurts of extreme weakness. This would tell me that I'm not as healthy as I could be. I WAS doing wonderfully health-wise right before I began kicking up the activity without kicking up the foodage, so I'm guessing that eating more is the answer.
Sorry to ramble..the bottom line is, I'm required to eat a lower fat (like 30% or less of intske from fats) diet in order to keep GI system calm. I also cannot tolerate execssive amounts of gluten and I don't care to consume living things. Does anybody have any suggestion for high cal foods that also match this citera? I already eat a lot of yams and whole grains, along with adding nonfat dry milk to foods.
Thanks so much!