Hello, I'm 29 years old, I've been writing my monthly period every month since last year, Im very regular with 28 days cycle every month, even im stressed, tired or anything it never affect my monthly period its always 28 days cycle since i started my period when i was 14 years old, never been delayed nor missed. March this year 2016 my boyfriend and I decided to try and start to plan having a baby since im tracking my ovulation, we had sex during my fertile window but only once and that was March 23...February 23 i had my first day of period, March 12 i had my first day of period too so my cycle is regular every 28 days cycle... But this month April Im having 1 week late of period and started yesterday Apri 15 supposed to have started April 8, am I pregnant in this case or just my period is 1 week late? is this normal? help me please, thank you... we really want a baby now as my boyfriend is already 39 years old, he is 10 years older than me...