I started re taking my pill on 13th may but only took about 5 then I stopped (not really sure why). Anyway, after a week of my period stopping I had bleeding. Only a small amount that lasted about a week (maybe less). Now my period is 8 days late. I took a hpt a few days before it was due but was negative. I am having bad cramps like my period and am really bloated and tired. Could I still be pregnant or is it likely to be because I messed around with my pill?