I am 9 days late. I haven't been stressed I have taking home pregnancy test and they came back negative. What do you recommend? And I have calculated my period 3 times and even done it online

Not surprised you got negatives... you are supposed to wait until you are at least 14 days late before a negative on a home pregnancy test is fairly reliable. Any sooner you might get a negative even if you are.

Also they MUST be taken first thing in the morning the first time you pee that morning....otherwise the results are very unreliable.

Sometimes there is a possibility of your periods coming late that the expected date. There is nothing to worry about it. Since the Pregnancy test has shown negative you just have to wait for your periods or consult a gynecologist for assistance