Did I take a test too early? Is there any hope?

I took a pregnancy test 6 days after ovulation and then again the next morning. Both were negative. Did I take them too soon? AF isn't scheduled to come until sept. 9th so there is still time right? Today I have been having super sharp lower abdominal pains... not like cramps. Very sudden and very sharp. Is there hope that I could still be pregnant or should I expect AF arrival 😞