You may have irregular bleeding and spotting for quite a while
, or nothing at all for quite a while
If you are sexually active and not using any birth control now, take a HPT about every 2-3 weeks until you either get your period back, or get a positive. That's about all you can do at this point. If this keeps up, you should ask your doctor what to do.
Are you wanting to be pregnant? I'm assuming so.