Not in the game long, but I feel like I’m set up for failure

My husband and I are ttc #2, but it’s so stressful for me mostly. When we had #1 we had just decided to stop trying and if it happened it happened. I even joked a week before my bfp that it would be funny if we were (jokes on me). I didn’t get a period while I breastfed our daughter and af came back about a month after I stopped. Great. I was worried that I wouldn’t have a normal cycle because I’d heard after a kiddo everything changes, but I was very consistent and all the apps I used were great just for tracking my cycle. When we started ttc I started checking my cervix, cm and doing opks and now my cycle has been a day late and my apps are failing me because my pms symptoms are changing my expected af date and giving me false hope. I’m trying not to stress over it and we’ve only been trying for 3 months, but I feel like my body is failing me and it’s really frustrating. Oh, and my cycles are short (27-29 days) and I’m ovulating on day 20-21. I just needed to vent how frustrating it is because I want another baby and I am terrified of a miscarriage, so this false hope is absolutely crushing my spirit. I’m supposed to have my af today or tomorrow and I’m positive it will come and it hurts both physically and emotionally. I’m going to talk with my husband tonight about what we can do together to get through this and have another baby, and I’m very blessed to have him to go through this with me, but in the meantime it just really really sucks. I’m open to seeing a doctor, but we didn’t have a plan for our first and she just happened so maybe we don’t need to track everything? I may have mentioned it before but it’s a really crushing feeling that my symptoms confuse the apps and my own understanding of my body.