When is the right time to go for my first visit to the gynecologist?

I found out I was pregnant at 4 weeks, and had my first gynae scan at 6 weeks pregnant as the machine can't really detect anything smaller than that. Sac, fetus and heartbeat was already visible. It'll be good to go after you test positive. You can try Clearblue's digital test kit for an estimate of how many weeks along you are.