Have you tried restarting your phone? After installing and uninstalling all of those apps a restart would probably improve the problems you're having.
Spottedcatfish is correct, have you power cycled the phone??? I tend to do it twice a day. I have an app (Device Information) that shows memory detail and RAM is just sucked up throughout the day.
Once I power cycle the phone, the memory is where it should be.
Agreed... sounds like too much going on. I've also had better luck rebooting phone after major install/uninstall of apps.