I'm on Loestrin 24, and I also don't get my periods anymore. I stopped getting them after my second month on it, and I also freaked out because I just had my second baby, but all tests were negative (I had a blood test done at the OB's office to make sure...). My OB just said that is normal for me- it is a common side effect... a rather nice one!

I also get no PMS on it.

No other side effects to speak of.