A lowered sex drive can be a side effect of hormonal birth control. You may want to speak to your doctor about your concerns so that the two of you can pick a different pill or possibly a different method altogether that you feel more comfortable with. Sorry that I couldn't be of more help.

I had the breakthrough bleeding with Loestrin too. I went back to my doctor and she changed my pill. She said it was probably just too low of a dose for me; could be the same situation for you.