Ughh help

Starting taking metformin in October once the hubby left for deployment in hopes to get my cycles on track by the time he came home , if since then have had 2 periods , I do have pcos , I just feel hopeless :( , how am I ever suppose to get pregnant when I can’t get my period every month . I’m not over weight I’m in my early twenties . Its-

just frustrating , right now I’m on 1000 of metformin a day should I ask to bump it up to 1500 ?