Well you need not worry about pregnancy
as you have already taken i pill
in time and it has responded by causing bleeding .
Regarding your menses you will have menses this time some what delayed due to i pill
You need not worry about it mostly after that your cycle will be normal.
Now onwards be carefull about protected sex and further as you can relations on 23rd of this month you had sex during safe period so without i pill also there were no chances of pregnancy .Anyways forget that you may have your menses within 10-12 march.If not you may need medical consultation,