Why do I feel so frustrated?

Currently 39+2. Our baby boy is sitting really low and my whole pelvic area hurts and I have to pee a million times a day. I don’t sleep well. All of this is normal and I know it means I’m getting closer to meeting my baby. I’m so fortunate that I really have no pressures or responsibilities right now other than taking care of myself. Yet, I feel frustrated almost all day long. Is it just the fatigue and physical discomfort? Is it a hormonal shift? Am I not getting the right foods in my diet? Is it the lack of exercise because I’m too sore to walk? I feel like I’m unjustified in being as frustrated as I am... I thought I’d be patiently waiting by now but mostly I’m just trying to get through each day. Anyone else?