Cephalexin and regular Ortho birth control for acne?

So I have been on Ortho for 3 months, and started the cephalexin (550mg 2x a day) for 12 days now. My acne did not get better from taking ortho (I felt it got worse) and my skin is not better on cephalexin. I was also prescribed differen for night and erygel for the morning which i have been doing for 10 days. Should I stick to all of this or what? has anyone taken ortho and cephalexin together? when should i start seeing improvements in my skin. I have moderate acne.