Some Advise Please

So I got off the copper IUD in middle of Feb.and started taking the pill . Then we decided to start trying right away instead of waiting some more. So I only took the pill for about a week. AF got here on the first of March and it hasn't been back. My cycle is usually 30-35 days. Could the pills have messed with my cycle even though I took them for such a short time? Is there some thing I can take to bring back at without messing with my fertility?

Oh, and I'm not pregnant. Thought that could be it but I already went broke on all those hpts.