hi there
im 18 years old. My period cycles have varied in the past between 23days and 40days but ALWAYS comes sometime in the month. But it did not come last month and is still to arrive! i have done 2 pregnancy tests within a week of each other both we're negative. When having sex with my boyfriend we ALWAYS use a condom and he checks it afterwards to make sure its not ripped or anything! Just wondering if i should do another pregnancy test or i've just missed my period which would be unsual as that has never happend before and so what could be wrong?

please help!