I had mrsa. doc said use hibiclens but she also told me that using antiseptic soaps can kill normal bacteria leading to more infections? is this true?

Yes: Hibiclens will kill all types of bacteria on the skin, but it is sometimes necessary to use this strategy if you, or any close contacts, are getting recurrent skin infections with staph bacteria (incl MRSA). In order for this to work, all close family contacts should be treated. Also, nasal carriage of staph should be addressed. If not, the skin can quickly recolonize.