What if I have light bleeding but no period for 6 weeks with 2 negative pregnancy tests 2 weeks ago?

Hello, it is likely that the morning-after pill has impacted your cycle. The small bleeding period you experienced may have replaced your menstrual period, so your next period may be delayed. I suggest that you take a pregnancy test every week until your period returns. Additionally, I recommend that you obtain contraception that is more appropriate for your situation.