I am experiencing pregnancy symptoms, (nasuea, breast tenderness, abdominal pain, lower back pain, etc). I took 4 home pregnancy tests and they have all been negative. My last full period was 12/5/16. I had what I thought might have a period 4 days late from my regularly scheduled period. It was only 3 days (it s usually 5-6) and unusually light. Should I just wait until my next period date to take an at home test, just to make sure?