Ok need advice

Ok so last month I started taking metforming n prenatels to help up my chances of concieving I've been trying for 6 months now ok so last month my period was 38 day cycles this month my af came at 27 cycle day which was the 22 nd so I ipad that on here and it switched my info so I'm confused when I should start concieving or if I should start when says n just keep going Cuz I don't wanna miss my chances