Late Period... Feeling Bloated Negative Test? Please Answer ASAP?

Quick questions for the girls, I have now kinda regular periods they go from Coming on my period on these days 23 March 2011, 26 April and 25 May was my last period so technically i was due on 25/26 and no sign so i am about 6 days late - i took a test to see but cam up negative, do you think my period is just running late or?? I am not stressed or anything which would effect my period so bit confused. I have had unprotected sex and am trying to conceive no luck as of yet. Hoping this could be the time. I not sure if the test had not been done right i took it mid day so not with my first urine of the morning, or could it be worng? If you could help that would be great. Thank you Guysssss