Hi Ivy. It is so tough as a mother to take care of yourself when you are busy taking care of your kids, especially when they are ill, but you will feel so much better and be a better mom when you do, and it sounds like you know this! Honestly, I would stay away from pills-- they can be quite dangerous!
There are so many ways to calm down your hunger naturally. Try drinking lots of water and green tea. Fill up on complex carbs with tons of fiber like apples, berries, melon, celery, oatmeal, whole grains and shredded wheat. I also try to always have some fat or protein with my carbs, or I get hungry sooner. You can make your own trail mix to take on-the-go with nuts, seeds and dried fruit, or make a protein shake before you head out the door or grab a mozzarella cheese stick. Hummus and veggies make an awesome low-fat snack. Also, yogurt mixed with some ground flax seed and a little protein powder or cottage cheese is very satisfying. For dinner stick to lean meat with salad or veggies and a small portion of rice or half a sweet potato.
If you eat a small meal or snack (around 300-400 calories) every 3 hours, you will have lots of energy and won't get so hungry that you are tempted by unhealthy food. Just wash and chop up a bunch of veggies ahead of time or you can buy pre-washed spring mix lettuce, sugar snap peas and baby carrots. Be sure to have plenty of fruit around so it is always available and throw the junk food in the garbage so it isn't in the house. Cook up a big batch of rice -I like basmati-so it is ready for quick meals. If you like chicken, there are lots of places that sell whole rotisserie-style chickens already cooked that you can use in so many ways. Find books or websites that motivate you to get healthy and read them often. Stay away from the fast food drive-thru too. Good luck getting back on track! I hope your son is feeling better.