Should I be concerned...

[liquid-insomnia.livejournal.com]

I'm on the 4th month of taking Loestrin 24Fe, and only once did my boyfriend and I have sex without a condom (2 thursdays ago). I had really light spotting yesterday, and a little more today, I'm wondering if that's any kind of sign that I could be pregnant or something. I take the pills everyday at 9am, so I never miss one. Whenever I'm under extreme stress, I naturally get spotting, and the first day with this spotting I thought my boyfriend and I were going to break up, and the next day wasn't any better, so is it from stress or should I start to freak out...