All you need to know, and the most important thing is this...
Your comfort! That is it. If you feel comfortable with yourself, how your look in the mirror, then you are home free. Getting your mind to let you be is the tricky part. We gals are so self conscious about how we present ourselves that it is kinda hard to break our own old rules.
What helped me the most is that I stopped looking for peoples reactions to me. I try very hard not to notice whether they are looking at me with approval, or disapproval. My husband notices whether I am being noticed, and sometimes he tells me how I got noticed at a place we were at, but he only gives me positive reports. I don't know if there are ever any negitive looks, or he just knows it wouldn't do me any good to tell me anything negitive.
Bottom line is that if you feel comfortable with what you are wearing, you go for it. You are the only one who knows your comfort level. There are no rules other then that. I'm sure you have read all our info on what to wear at work or church to make sure certain parts don't show too much. My feeling on that is that even there, who cares if a nipple shows a little. Sheesh, we all have them, right?
Here's the rule...brafree breasts rule!!!