Thanks for the query.
You should have checked for pregnancy
in the last month, when you got excessive bleeding.
Because after one month urine pregnancy test kit may not detect beta hcg
You wait for one more week, possibly by that time you will get periods.
If not consult gynecologist, get examined and go for ultrasound
Then with her advice you can go for tablets to induce withdrawal bleeding.
If same thing repeats in future, you can go for hormonal