i had unprotected sex on 31st march night and since then till 2nd morning. While having sex on 2nd i had little bleeding in the end and i took an ipill later almost after 44hrs after first having sex. After i had the pill initially i had nausea feeling and cramps till next day maybe..by then i started bleeding initially brown discharge then red..its been 7 days n I'm having red bleeding now n den and I'm feeling really weak and tired..i go to bathroom quite often and initially had nausea sensations..i want to know as to what clearly is happening any reason for concern..irregular bleeding? chance of pregnancy ? any concern issue?