i was born on August 09,1975 im not happy of my married now.Can I get married in 2nd?

Isabel, actually your birth date reveals that your marriage is happy. I don't know what makes you feel unhappy. At least, you should make efforts to save your relationship. If nothing changes, then you may consider divorce and find another man.

For your career, it fully depends on youself. If you work hard, I think your employer will see your efforts. As a result, you will work until your contract is over.