TTC after MC

Taylor
We got the go ahead after my 2 weeks post D&C visit on Tuesday to TTC again. I haven't had a period yet obviously but we've been BDing every other day since Tuesday. I noticed last night I had started to feel some cramps where my ovaries are and that usually is a sign to me that I'm ovulating, at least before I got pregnant. I knew I was ovulating bc of that. Then today I noticed I had some egg white sticky CM which is also a sign to me I'm ovulating. Well I took a pregnancy test and ovulation test to see where I was at and the pregnancy test came out negative but also my ovulation test came out negative too. Do you think the ovulation test could be wrong still and there is still a little bit of HCG left even though I got a negative pregnancy test