Did I test to early?

Ok so I'm on CD24 and I believe I ovulated the 9th or the 10th. I took a pregnancy test this morning (the 16th). And it came out negative. I'm not sure if I tested to early. I have never been pregnant before so I don't know everything but I have been getting very light cramps and I have been extremely bitchy pardon my language lol and I'm also sick. Someone please help. Thank you.