Can I file for a petition for fiance visa even if I am only working for 2 months currently at my job?

You can petition for your fiancé but you may need to have a joint sponsor. Your fiancé must establish he will not become a public charge. Given you have only held your current job for two months, your fiancé may need to have a joint sponsor to convince the consular official he will not become a public charge. You can read more about establishing your fiancé will not become a public charge athttp://myattorneyusa.com/overcoming-presumption-of-public-charge.