Annoying

I don’t get what’s up with my body 😩I got AF back after my first at 6 months postpartum and my cycle was like clock work as it’s always been my whole life and same pms symptoms I always have . Super clear easy to see ovulation symptoms. Now all of a sudden when we start “trying” again it’s all over the place... early, late, crazy random symptoms. Nothing is different in my life. Same foods, same lifestyle and fitness level... every month it’s something different.