Help ! Could i be pregnant?

Now to start off I am extremely irregular with my period, mostly one every 4 months or longer , I don't have PCOS, and all my levels are fine, it might be because I'm over weight. Well anyway, I've been with my fiance for 9 years we don't use protection(pull out method), I've been getting cramps and very bad bloating, the discharge is a milky white stringy consistency, I'm tired 90% of the time, I was thinking my period is coming but it just feels different this time, could I be pregnant??