my first day of menses was 28th Aug 2014 and average cycle length is 29-30 days. i had unprotected sex on day 11 of the cycle i.e 7th Sep and after 8-10 hours took postinor2. i have been having lower abdominal cramps since 9th Sept, nausea, sometimes headache, loss of appetite, and fatigue. Am on day 19 of my cycle, could i be pregnant? I know it is still early to test. i really am not ready for that now.