chemical pregnancy?

over the past 4 or 5 days I've taken 6 frer test. the first 4 were very very faintly positive, didn't seem to get any darker.i took 3 today, (poas addict ) 1 pos, but the last two I took look negative to me.. I don't know what to think...could it be I'm early and my urine is just too diluted? the past two days or so I've been running to the bathroom every 30 mins (sorry if tmi) so can't really get a concentrated sample. Out of tests and patience lol. What do yall think?