positive and negative test

Samantha
So confused I had a miscarriage December 2016. My doctor told me to expect my period in 4-6 weeks. When week 4 came I was having pregnancy symptoms so I took a test and it was a faint positive took one a day later and it was negative so I just waited. Here I am at 6 weeks and still no period. Took a test Sunday and again faint positive, took a test this morning and it was negative. 
Pregnant or not? 
January 28th 
January 30th
February 1st
February 5th
February 7th
February 7th