1) Am I getting enough fiber?
Looks like you're getting a good SF base with each meal. Now you need to add more IF (as much as you can safely). You should be eating IF with every meal even if it is in small quantity.
2) Milk/Calcium. I have had trouble with Soy and Rice Milk. So I do not drink milk. I also stopped taking Calcium pills afraid they might cause constipation, am I doing any harm?
You can also try Almond milk. Calcium pills should be taken with Magnesium. You can usually find one combo pill, ratio is roughly 2:1, 333mg of calcium to 160mg magnesium. Try starting with 1 pill a day, and work up (not sure for men? women should take 3 a day)
3) I am trying to get stronger at the gym, but I have been getting weaker. What can I do for the diet?
Eat as much protein as you can from safe sources like you are now. You could also look for a protein powder. Try doing a search on the boards for a safe one.
4) Is having carbs as my last meal bad?
Nope, but try getting some IF with it as well!
Ideas for IF:
berries - strawberries, blueberries etc (easier to tolerate if pureed)
cooked veggies - grean beans, tomatoes, broccoli (the more mushy/cooked the easier to tolerate)
nuts
whole grains - sometimes I mix in some brown rice or whole wheat pasta with white rice/pasta