Actually I had sex on 12th March 2019 and took unwanted 72 on 13 March and took test on 22 march then 23 march I got bleeding which lasts for 3 days but bleeding is normal with clots and then I took test on 5th April and 19th April again negative and on 26 April I again got bleeding in which flow was normal on 2nd 3rd and 4th day but on 1st day flow was less and it last for 5 days and next month I took test on 5th may again negative and this month I got bleeding on 26 may and it last for 3 days but there is normal flow with clots soo please tell me why there is clots in periods and am I safe from pregnancy? Please reply asap.