I am in the very same position.

Infact we have been trying for 13 months and have just done the testing and get the results this afternoon.

I do not know whether to hope that maybe there is something wrong and it is easily fixed (as then we will have an answer) or to hope that there is nothing wrong and continue the frustraiting cycles although my doctor told me that some couples have nothing wrong with them and just are incompatable so I do not know.

I suggest getting the testing and at least then you will know what you are dealing with.

All the best