Freakishly light period on Loestrin 24, PLEASE HELP!!!!?

You shouldn't be concerned about pregnancy. Funny thing, I used to be on Loestrin 24 and then they put me on Cyclen because I wasn't even getting my period because the estrogen level is really low, where as Cyclen has a very large estrogen level. Your body is probably used to having such a high level of estrogen to trigger your period. It always takes a few months for your body to get used to a new birth control. That being said, I'd wait to see how your period is next month, and if it's the same, I'd talk to your doctor about it. Because, it can be scary always thinking your pregnant because of a very light to no period, at least for me. (That was one of the reasons I changed from Loestrin.)