Hi, I And My Wife Have Been Trying To Plan

Hi,

I and my wife have been trying to plan a baby.
My wife had last period starting from 5th March. Her average menstrual cycle is 31-32 days.
We had unprotected sex on 16th, 18th, 20th, 22nd March.
My wife took home pregnancy test on 5th April. In result, 1 pink line was dark, and the other was light.
Symptoms my wife is facing:
1) Cramp in the feet
2) Occasionally nausea
3) NO tender feeling in breasts
4) No other symptoms

Please advise us.

Thanks !!

--
Abhishek