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On reading your history, i would say a combination of each of the above is causing the infertility
issues, an adenomyosis
causes obstruction and hormonal
imbalance and the PID will lead to adhesions in the uterus
and tubes as well, the size of your ovarian follicles depends on the time of ovulation, we expect a size of 18cms for a good chance of fertility and release of ovum.
By taking medicines there wont be much possibilities of conception in your case, as all the issues must be tackled one by one. With your age also being a contributing factor, IVF is the best. But you could also first give a trial on medicines and other procedures first and then go for IVF, but personally i feel IVF is the best for you.
Talk to your In laws and explain it to them as IVF is safe ,and yields promising results
Wish you the best chances to conceive soon.