Questions and advice help me out ladies first time experience

Hello I wanted to know a few things and advice...I been trying to conceive for 2 years now recently in the beginning of this month I found out about pregnitude and started taking it in the first week of November I came on my cycle on the 1st and ended on the 5th I got my ovulation peak and ovulated on the 10th and then spotted on the 13th I went to the doctors and they tested me for blood and urine and it came back negative but three days later I take a home pregnancy test that’s digital and it said yes and then tested 4-5 mins after and said negative what could that possibly mean could it be to early haven’t gotten to my cycle yet