Need one suggestion

Currently I have 1 baby boy of 4 yrs old. Had one spontaneous miscarriage last year 2023 Aug. post that unable to conceive. We went for 4 months of fertility treatment, did not get success. But my wife got health issues and side effects. After that when we stopped taking treatment, health wise she is completely fine. It is 5 months since stopping treatment, health is stable now, but still unable to conceive. Should we seek doctor help again for treatment? Or should I avoid these treatments? Kindly advice. I am not in a state to take any decision. Thanks.