Hello dear
I understand your concern
You have did sex 1 day after the period. It is completely safe period of the cycle.
Bleeding that occur after 6 days is
breakthrough bleeding due to
progesterone withdrawal effect (side effect of the I pill).
If you have taken I pill with in 24 hour of sex then it is very effective in preventing the
pregnancy.
It has just 1-5% failure rate.
Again you had sex and I pill was taken.
There is high chance of
hormonal imbalance as you used two times in short duration.
Your next period can be delayed (1-2 weeks)/earlier, excessive bleeding can occur.
If period will delay by the more than 2 weeks then go for urine pregnancy test and or blood HCG by consulting the gynecologist.
Meanwhile avoid
stress, take healthy diet, drink plenty of water, do regular exercise.
Use safe sex practice like condom.
Avoid regular use of the I pill.
Hope this may help you
Contact further if follow up requires
Best regards
Dr. Sagar