I could tell you about how we could destroy syria with a couple aircraft carriers. That their own military is splintered due to an ongoing civil war. That they have no capability whatsoever to attack us, and that any such attack would be met with an overwhelming response. But really, while all those things are true, i don't think it'll help you stop worrying. War is sucky, and everyone is trying to avoid it, especially Syria.
But in the end, should a war happen, they have no way to attack us on a meaningful level. Just as an example, Iraq had a much more capable military than syria does now.
Try not to worry so much about it. the situation is far from dire.