Glad to heae that you're not taking too many APs. I think the single mistake students tend to make is that they take too many APs and don't do well in them. And then the actual college courses for those classes turn out to be a lot easier and take up way less time. Three should be the maximum IMO for AP classes. Especially in your senior year. Like it or not, you will get senioritis the second half of the year. It will happen. You swear it won't but it will. There's a reason when I took AP economics I got a 5 on Micro but a 4 on Macro... Micro came first.
It's really not that bad as long as you come up with a schedule and stick to it. If you haven't done so already, pick at least three colleges that you want to apply to (first choice, second choice, safety). Do not apply to just one; look at a few of them. You never know when one will come through with a free ride or an excellent merit-based scholarship (which you sound like you qualify for). Your safety school should be one that you know you can afford and get into. For the other two (or more) don't worry too much about the price tag; apply and see what they offer you. Then when decision time comes, pick the one that fits your budget but also fits your needs.
Make sure you check out if your schools use the Common Application. It saves time.