Aunt Flo showed :(

I’m so so sad because my body made me think that maybe this was my minth🥺my cycle for the past 2 months has been lasting 31 days instead of the normal 27-28 days. I honestly don’t think I’m ovulating. I went to to the dr and told her about my concerns and she didn’t seem very helpful. I feel like giving up. Does anyone have any recommendations for prenatal vitamins?