Thanks for your query.
Since after having being intimate you have got your periods the next day then there is no chance of you becoming pregnant.
If you are having very frequent menstrual cycles, it could be due to hormonal
disorder. In this case taking Ovral oral contraceptive pills
will help to make hormones balanced and your excess bleeding may stop and menstrual cycles will become regular like before.
I hope I have answered your query.
Wishing good health.