Is it just too early?

Nicola

2 days ago at 10 days til my period I took a pregnancy test and there was a faint positive line. I took one about 7 hours later and there was still a line but it was fainter than the first one. The next morning and this morning I took tests which both came up negative. Im still 8 days until my period is due though, could it just be that I am still pregnant but there is not enough hCG in my body yet? Photo of my first test.