I'm not trying to 'get on your case', but there are some common situations where riding on the shoulder, along the curb, or alongside the right side of moving traffic will set you up in a dangerous chain of events.
This is a very good web page that discusses some of these traffic scenarios in a simple clear way:
http://bicyclesafe.com/ Maybe one of your near misses this morning was similar to a situation discussed there? Just something to look into- we all want to be safer on our bikes.