Had my periods on 26th of feb.. And had unprotected sex in the 1st week of march. My next periods came on 19th of march.. Did a pregnancy test on April 13. It came negative. Its 5th of may but didn't get my periods till now. Can I be pregnant?
Ps- I did not took any pill.

Could be due to pregnancy, could be just a skipped period for April. Some women do have bleeding in early pregnancy.

If you think pregnancy is still a possibility, try another test at this time. If negative again, it's most likely that you've had irregular cycles, which can sometimes happen.

When in doubt, check with your doctor.

Of course you could be pregnant, or in the midst of an irregular period as has been said. If you do not trust the home pregnancy test then see your doctor for a more comprehensive test to know one way or another.