Hello Welcome to HCM, thanks for posting your question.
I read your question and understood it.
See, to be frank, copper T is a foreign body that prevents fertilization.
Hence, I would like to tell you that, definitely a foreign body will alter physiology and also the
uterus especially when you have used for long time.
But there are no supporting papers published that says, it will hamper fertilization.
So I suggest you not to worry and keep trying.
That should be fine. For about 9 to 12 months you should be able to conceive.
If not then you need further evaluation.
So, don't put a lot of
stress on yourself.
Be happy, be confident, positive and see how things go on.
In case you need any help with this, you can contact me back. Take care.