Hi! I'm hoping for a little info please 
I found out a couple of weeks ago that I'm pregnant, which is very welcome news. But I'm really confused as to how far gone I should consider myself? (I have a midwife appt next week but even the doctor didn't like to put a date on it so I guess I won't know for sure until the scan).
Basically I have incredibly irregular periods. My last period began on 15th November, so technically I guess that makes me 9 weeks. But I'm almost certain I conceived on 13th December (we didn't get up to 'it' much that month!). So from conception, I'm 5 weeks. I use Ovia Pregnancy app and it considers me 7 weeks, and I've been thinking of it that way, as most women would have had their period around 2 weeks before ovulating.
Is this right or would I actually class as 9 weeks? But this would be misleading in terms of baby's week by week development, no?
Thanks in advance 