Baby fever at the wrong time

This is more of a vent post, I just have no one to talk to about this. I’ve been having some strong baby fever for about a week every month for the past six months. I’m going to be 21 in two weeks, I’ve been dating someone who is 20 years older than me for a year now. We are going to seriously talk about having a baby at the time of our two year anniversary, but I need to exercise consistently, (His mom had a rough pregnancy and exercise helped, it’s been hard for me because of my past with my eating disorder). We had decided to not really talk about baby things until the agreed time but it’s been so hard for me. I’m just having a really hard time coping with it, when I know I have a year to wait, it just feels so long