Is there hope?

My husband and I have been trying for a few months now. I have PCOS but my period is on time 99% of the time, the other 1% being maybe a day late or a day early. I am currently 6 days late. I have had some clear watery discharge and I have felt super tired. I have had some light cramping but it lasts for a short time and they aren’t as bad as normal period cramps. I have taken a test and it was negative but I guess I was curious if it’s still possible. My husband and I did the deed a few days after my ovulation window which was only about 10 days ago. Is it still possible that I could be pregnant but too early for it to show on the tests? Im still learning all about these things so im sorry if this is a stupid question.