Hi Sagar, Welcome to HealthcareMagic Forum.
If you have had Unprotected sex recently, you could be pregnant as your symptoms suggest Pregnancy
. Its been one week since you missed your periods and it is the right time to get a Urine Pregnancy Test done using a early morning urine sample. If it turns out negative and you don't get your periods repeat the test again after a week.
Good Luck. If it comes out positive, visit a Gynecologist.