Hi T.!
I completely sympothize. We are a military family and I don't know how many times I had to make the call on my own whether or not to "take them in" to the er or doctor. (Never having family nearby!) Although I'm fortunate my mother is only a phone call.
The best advice I can give you is go with your gut. A mother's intuition is usually right. However, a few things to watch:
Listen to his back. Listen for a "crackle" so to speak. If you hear that...definitely take him in. If the mucus is bright green, this is a sign of infection and fever over 100 is something to worry about. And any time they vomit, unless it is just something they ate, is always a warrented trip to the doctor. Go for you peace of mind, if nothing else. It IS definitely worth the co-pay!!!
However, I would also stress to the doctor your concerns. They are usually happy to go over a list of symptoms that should be red flags to you.
Also remember, with kids, you never know what is going to happen next when they are sick. My daughter was bouncing off the walls, not really acting sick when I took her in one day. The doctors and nurses all of the sudden looked at me during triage and said "maam, are you aware she is running a 104 temp?" I felt like the worst mother in the world. She went from 101 to 104 in 30 minutes. So sometimes, its just best to take them in. But always, go with your gut. It is usually right!
Good luck! Lee
P.S. E-mail me if you have any questions. I'm happy to help. My brother was a baby that spent the first six years in and out of hospitals. My mother has me pretty well versed on what to do when my twins get sick! I would be happy to be an e-mail buddy. Being a mom should come with a set of instructions!!! LOL ~take care.