opks are still positive

So I was tracking my ovulation from the last two days when my period was finishing, those two tests were negative, then the next 10 were positive, I've been for a blood test on Monday but my hcg was only 2, I'm on day 22 of my cycle, an was curious so took another ovulation test, again positive, so I thought I'll do a pregnancy test but still positive, this is seriously doing my head in can someone give me any advice?