I do appreciate your concern. Let us try to analyse your situation.
First you had your regular period. Nothing to discuss about that.
You have taken morning after pill a week after your periods were over. This pill contains reproductory hormones in higher doses. So after about 8-10 days or so, withdrawal bleeding is expected. Usually this bleeding is not heavy. I hope you had lesser bleeding in this withdrawal bleeding.
After one week, again you had menses. This is something not very convincing. However, some menstrual irregularity after morning after pill is observed in some cases. So you can attribute this additional episode of bleeding again to the effect of emergency contraceptive pill
you had taken. I hope this episode of bleeding was not heavy and prolonged.
I would advise you not to panic, wait patiently for your next manses before you take any action. Your next menses may be delayed due to this additional episodes of bleeding. You need not be worried about it. It will not be due to pregnancy
If even after the next menses also your menses persist to be irregular, then please report to your Gynaecologist. You may have to be on birth control pills for about 3 months to regularise the cycles.
I hope you are satisfied with the explanation.