When you pregnant after how many weeks is the best to seek medical advise, to also see the gynaecologist?

As soon as aware: As soon as trying to conceive you should be established with Gyn. That will allow for proper followup and recommendations throughout. Guidelines may differ slightly from country to country otherwise.

Agree with Dr. P: Ideally you should consult a doctor when you plan to get pregnant. For now, the sooner the better. Wish you good health and a healthy baby!