Unprotected sex 3 days before my period due to condom breakage. Took ipill after 4 hours. Experienced vaginal bleeding after 5 days with abdominal pain on the first day. Initially thought I had started my periods which were overdue by 3 days but the flow has been very light on day 2 and 3 so unsure whether its a side effect of the pill or actual periods. No clots noticed but the colour is darker than before. When can I expect my periods to start? How soon can I take a blood test to rule out pregnancy? Very stressed. Hoping to get a reply soon.