2 faint lines, a digital positive, bleeding and now negative :(

Mel
Hi, 
I had 2 tests on Thursday with faint lines, Friday I went to get a digital test which came back with a positive result 1-2weeks (clearblue) 
On Monday late evening I went to the toilet for a tinkle and saw a little pink, Tuesday we have light flow and cramps, today we have lighter flow but some small clots. 
I called the emergency advice line to get some advice and they advised me that I was never pregnant... can this be true? The lady said our bodies play tricks on us and to take this as being a period. 
Is that right? I am sure it can't be! X