You need to count from the first day of your last period. Then count the weeks that’s how you find out how many weeks you are. The midwife will ask you that question xx
Your booking in appointment should be by 8-10 weeks and it first scan at 12 weeks. Have you told your midwife that you think you believe your 15 weeks s there's some tests you would have missed out on?
If you're not already take a pregnancy vitamin and get lots of rest, the tiredness should improve as you get to your 2nd trimester and the placenta takes over much of the hard work.
For back ache you could try a yoga for pregnancy class, some gentle stretching and relaxation is lovely.
Content on HealthUnlocked does not replace the relationship between you and doctors or other healthcare professionals nor the advice you receive from them.
Never delay seeking advice or dialling emergency services because of something that you have read on HealthUnlocked.