30 weeks and decreased appetite?

I eat so much I’m not going to lie, I find if I’m not eating I start to feel unwell but my question is, my appetite has hugely decreased like the last couple of days I’ve hardly been hungry I haven’t been eating much even at meal time. I ate about half of what I would eat yesterday for lunch and that was with having a small breakfast yesterday morning too compared to normal. It may be a silly question buttt can it be a sign or my body getting ready for labour ? It appears although it may not be that my bub has ‘ dropped ‘ and I’m really feeling the pressure and peeing every five minutes with nerve pain running right through my pubic bone and even through my vagina ( sorry for tmi ) like actual inside of it. I have also been extremely exhausted which may not mean anything considering I’m 30 weeks anyway. Without negative comments lash me your opinions please ladies xx