Hello. It is normal to feel that way at anytime of your pregnancy. Just don’t forget to keep yourself hydrated. I believe the dizziness is due to the weather these days also you might have tension headache which I had it during my first pregnancy. I also had iron deficiency so I believe that’s why I always feel headache and dizzy. So I just take a packet of Milo/Ribena, works sometimes. Hopefully it works for you too.
I hope you will feel better soon! Take care 😊