I'm going to second guitargirl252. You really should consult your doctor or see a nutritionist. They'll be able to tell you what's best for YOUR body.

Otherwise, good rule-of-thumbs for hypoglycemics are (1) read labels. Sugar is in just about everything we eat. Even the store-bought peanut butter has sugar in it. High fructose corn syrup, Fructose, and cane sugar all count as processed sugars that could spike your blood sugar. (2) Good snacks include nuts or trail mix (Be careful! A lot of dried fruits have added sugar), soups (chicken/meat with veggies), raw veggies, cottage cheese (lots of protein and calcium), or PB and celery/apples/carrots. (3) Avoid caffeine, sodas (diet or regular – they block nutrient absorbtion), margarine (real butter is preferable), fake foods, artificial additives, chocolate, deep fried foods, and sodium preservatives.

Wow! That sounds like a lot, now that I read it back Sorry if it's an overload, but I hope this helps. Still, talk to your Doc about your concerns. S/he can help you the best.

You really need to get your son starting on solid food. My daughter has been chewing solid food since she was 10 months old. She is 15 months and still does not have any back teeth. Just cut up his food really small.

As for baby snacks, I get my kids:
bananas
yogurt
cheese
Teddy Grahams
Ritz crackers
Graham Crackers
Oreos
frozen yogurt
cut up fruit
gold fish crackers
applesauce
animal crackers

Basically anything you can eat, he can eat.