Hi S.,
Good for you for using Mamasource-there is tons of great and valuable info here.
You need to hydrate the baby. Be sure he's getting plenty of breast milk or formula. I believe you have introduced "solids" a bit too early. Solids at 3 months should only be in the form of rice or oat baby cereal, mixed with breast milk of formula. Other first foods are avocado puree, sweet potato puree.
A 3 month old does not have the digestive system developed enough to handle anything else. Nor will he have the ability to eat off a spoon yet-he needs a bottle/breast.
Get a print out from your pediatrician on how much formula he should be taking in on a month to month basis.
I have some guidelines from an excellent book I think you should get:"Super Baby Food" by Ruth Yaron.
P. 12 Signs of Readiness for Solid Foods
Weighs 13-15 lbs.
at least 4 months old
Drinking at least 32-40 oz.of formula per 24 hrs. and still wants more
You need to stop giving him baby food at 3 months. Please don't take offense. I want you to have a happy and healthy baby which will make the rest of the family happy.
-please call your pediatrician and discuss it with them. Tell them about the 4 poops-which should not be very solid yet. Tell them how much formula he is eating.
Keep a log of everything he eats and how many wet & poop diapers he has. Ask your caretaker to write int he notebook log too.
Example:8am-Wet diaper, Ate 3 oz. formula
9:30am-Poop diaper-was solid-very fussy
10am-Ate 2 oz. formula
12pm-wet diaper
Hang in there. Having an infant is an enormously time consuming and stressful thing, especially when you are in school too. Thank God you have help. I wish you the best and feel free to email with other questions. But I really want you to keep records and talk about that info with your ped.