Twingy feeling?

So, On April 18, I was ovulating and my fiance and i had unprotected , he pulled out. 6 days later I experienced ver light pink and brown spotting only for a tiny bit. The day of my missed period, Thursday the 1st of may, I took a preg. test from family dollar and it came negative.It is now 5 days later still no period, had slight cramps but thats it. Today I had some werid TWINGING/PULLING feelings in my lower abdomen.. Do you think when i tested b4 it was too early to tell? Pregnant? What do you think? Thanks!