My first test was negative my second was positive but i went to the doctor negative.

I haven't had a period since September 26 took my first test in oct 30 negative. .took my second test on nov 1st it said i was pregnant. .went to the doctor today nov3 and took two of there pregnancy text and it came back negative. . How much longer should i wait before making a doctor appointment? What are some of the symptoms i should feel?