How long have you been on Ortho Lo? You should give your body atleast 3 months to adjust to the new hormone levels.
Let's see... as for me, I was on OTC for a year. I got terrible headaches and mood swings so I switched to Kariva (generic of Mircette). Kariva got rid of those headaches but I got REALLY bad cramping during my period. So, I switched to Alesse. Alesse was the worst pill I've been on. I got headaches, cramping, breakouts and extreme mood swings. Now I'm on OTC LO. So far so good. This is only my 2nd month so I'm giving it time.