Could i still be pregnant?

Jeanette
I found out on 7/29 i was pregnant but on 8/6 I started to bleed with cramps and lower back pain. I saw a blood clot on my underwear. My bleeding was not heavy and 8/8 it was gone. I did a pregnancy test today and it come out negative. The thing is i did a cheep pregnancy test ($1) do u think I could still be pregnant ?