I had unprotected sex about 1-3 May 2009, then a period came on 9 May for about 5 days. I was on BC but stopped taking it before my period came on because my bf and I broke up.There was only 1 day of regular bleeding and very light the other days, mainly spotting. I have a fairly regular cycle, but then there was no period during June. Took a HPT and it was negative. Then in July the same thing with only about 1 1/2 days of a regular period and then just brown spotting the rest of the time. I was pregnant once before and at about 6 weeks had tender swollen breasts and lots of puking. This time, nothing like that, just feeling a bit light-headed at times. Is it just stress? Or is every time different, hence no puking etc. And it is possible to miss out a period for a month, have a light one again and still be pregnant?