Multiple visit to USA on B1/B2 visa in short interval.?

Hi surakhsha , I am also having the same visa and travelled to US 3-4 times yes it is true that frequent travelling to US after 9-11 is suspicious , but u can travel to US as many times as long as u have valid visa but u have to give possible and genuine reason for ur entering to US , because now a days they ask u lot of questions on the immmigration counter , and NEVER EVER think of extending ur ENTRY while living in US as it will badly reflects on ur next entry when u came to US , so dont worry and travelled a lot but with Proper reasons and proper proofs, take care