I test myself and took pregnancy test is a week twice. First is when I missed my period one week. Then I miss my period again another week then I test again and still negative. Then I notice my urine was so orange yellow color. I have no symptoms of aching of stomach, or symptoms of having kidney problem. Is there any possibilities that I am pregnant?

If you are sexually active there is always a possibility of pregnancy. You need to see your OB/Gyn.

There are a small number of women who will test negative for whatever reason until they're well into their pregnancy. Is there a possibility that you're pregnant? Yup. Is there a possibility that you're not? Also yup. You're displaying the only reliable symptom that you're pregnant, being a missed period. That being said there are other reasons that a woman might miss a period, stress, illness, antibiotics, diet/weight issues, or a number of other reasons.

I would go to the doctor for the urine though, sounds like something isn't quite right that is completely unrelated to your periods.