Thank you for your response. I have specifically mentioned my age, however, I have also mentioned that my cycle has been very regular to this month and I've never had such delays - hence my concern! So whilst I understand that some hormonal imbalance is not uncommon at this age, in my particular case it didn't seem to be the case! Again, I've had regular periods up to this month. So what can I do to 100% exclude the possibility of pregnancy? Should I ask a GP to do another test (I've heard that a blood test is more accurate)?
Also, you say, Clear Blue tests are 99% accurate, however, there are plenty of discussions on different forums where women say they had negative clear blue tests and then it turned out they were pregnant.
Regarding the hormone profile test you have suggested: should I just ask my GP for it?