gassy and empty stomach feeling

Ella
My last period was on march 2 and i had an unprotected sex with my husband atleast every other day from march 1-8, got my very light brownish period again on march 9 now im scared that i might be pregnant 😭 this is very unusual plus i always felt like im always hungry even if i just ate i always got the feeling of 'empty stomach' and always need to burp.