Talk to Gynecologist on Missed Miscarriage

Assalam u Alayikum. I recently have had miscarriage, I have some questions to ask, please guide me. 1. It's been more than a week but bleeding hasn't started yet. How long it will take? Dr said that wait naturally for 2-3 weeks to pass the tissue, if it doesn't happend then surgery is required. 2. How long should we wait for the next pregnancy? 3. Can we intercourse with the protection during this time? We haven't started yet. 4. Someone told me that my husband's sperms are weak that's why it happened. If it didn't happen then baby would be abnormal. My uterus is healthy because bleeding didn't cause miscarriage. She advised to get genetics test done of the husband before conceiving next time to avoid miscarriage and abnormality. Is it true? 5. What tests and precautions you would suggest for the next pregnancy? I am very scared now, please suggest me the best.

P.s. I had mild pcos.