I was 18 days late on my period. I got tested when i was 9 days late negative preg test negative uti. I started having sore nipples and few cramps then today i had mild cramps earlier then started bleeding but its not heavy like i usually would be and a lighter colour of blood? And the cramps arnt as bad as usual either. Sore nipples have now gone. I am prone to uti i have had 3 in last 6 month plus a admission to hospital with kidney infection and sepsis in march this year. Any ideas on whats going on?