What Causes Absence Of Periods And Frequent Urination?

I am a 49 year old woman sexual active no birth control. I haven t had my menstrual cycle in 2 months prior my cycle was normal . I took two pregnancy test one at home the other in doctors office both test are negative. No signs of menopause but my breast are sore sometimes tender and look huge and I frequent trips to the bathroom also been having gas. I m I beginning stages of menopause?