Hey sweety, I really hate to do this to you, however I went through all this TTC myself after I had the removal of the Merina IUD.
Basically our lining in our uterus are extremely thin after having the Merina, as the hormone released while having the Merina causes this to happen. (Hence why we dont fall pregnant on it)
Unfortunately it takes a good couple of months to thicken this lining again so many pregnancies prior to the thickening dont stick. This is where a lot of the chemical pregnancies come into it because we DO concieve but the embryo just cant burrow into our lining. So we get all the pregnancy symptoms and BFP's that turn in AF (Gee Im really sorry to say this, but feel you should know). Dont get me wrong - obviously there are some pregnancies that do go on to full term but majority dont. Thats why they tell us to wait approx 3 months before TTC.
If it turns out you are pregnant a huge congrats to you (but take it really easy to help keep it sticky).
If its not go to a health store and theres stuff you can get to help thicken the lining quicker - to find out what try googling
I am proof that conception is possible after the IUD as Im currently 16 weeks and going strong!!
I wish you all the best and I have my fingers and toes tightly crossed for you, in hopes that you are preggers and that shes a sticky one.
Good luck and plenty of baby dust to you!!
xx