It sounds like your brother might need to see his doctor to have his medication or dose changed. With all of the large stresses he might need some extra help. It sounds like he is feeling very anxious too.
Schizophrenia is very hard on the brain, so he might be having some problems thinking clearly, even if he is not hearing voices or feeling paranoid anymore. If you brother is okay with it, you could go along with him to the doctor, and tell the doctor the things you're worried about. If your brother is there and says it's okay, the doctor will also be able to tell you about your brother's diagnosis and medication, and other things that might help you help him.
There are some good things to do to help his brain recover, like making sure he eats lots of Omega 3 fatty acids. The easiest way to get enough is to buy some Salmon Oil capsules and have him take 4 or 5 of them a day. You can take them too, they're very good for anyone. When someone has a brain problem like your brother's it's even more important to make sure you have enough, as the body uses Omega 3 fatty acids to help repair itself.
The BC Schizophrenia Society has a family support coordinator in your area (New Westminster) who can also help you figure out what to do. His name is David Dickinson and his phone number is 1-877-717-5518. When you call that number you will get an answering machine that will ask what area you are in. For New Westminster, you should choose Fraser North and then it will put you through to Dave.
British Columbia Schizophrenia Society
A reason to hope. The means to cope.