Need suggestion from you to take a decision

I am sharing the details in very short. I have 1 kid of 4yrs. Had one miscarriage exactly 1 year back in Aug 2023. we tried naturally from Oct to Dec 2023. As we did not get result and we were very anxious, so went for treatment from January to May 2024. But did not work and got some health issues and side effect of treatment. After stopping treatment, again health is fine from June 2024. But till now unable to conceive 2nd kid & we are now in September month. In past both the conceive had happened naturally. Now, what should we do?

1. Go to the hospital now again and start diagnosis and treatment again?
2. Wait for some more time (like 5 to 6 months). And if the things doesn’t work, then go to hospital after 5-6 months.
3. No need to go to hospital again at all and avoid all treatment. Keep trying naturally and if it happens then well and good otherwise happy with 1 kid.

Our age is 31+. What would be best for us in your experience and opinion. Please feel free to share. Thanks.