conception after copper IUD removal

[chapstersmum]

Hi all
I am new to mumsnet but looking for your help.
I am 27 and have one 3 year old little boy. After he was born I had a copper IUD fitted. This was removed 2 months ago and we started trying stright away. The first month nothing happened.
This months I got a really faint positive, then my period started the next day.
I have been using ovulation sticks which are only positive one day of the month.
I got pregnant by accident the first time round, so cant understand why this isnt happening.
Does anyone have any advice??