I'm scared, confused and upset

So My Husband and I have been ttc for two years, and I'm experiencing pain in my hip like when I was pregnant at 17. However, I just took a test and it came up negative. It has been shy of five months since I had a real period. My family has a history of PCOS and I have no clue what to do. I'm getting frustrated that I cannot give my husband and myself what we both want. Two years.... any advice?