12.8 isn't very high in pregnancy. You are more likely to have slightly elevated wbcs during pregnancy because it is foreign and your body sees it as such. I am guessing your dr isn't going to bat an eyelash as that. Low rbcs in pregnancy is common too. I would be more concerned about your platelets and hemoglobin and hematocrit. (L&D RN)
I don't know what any of that means, unfortunately, but the change in emotions part definitely could be hormones.
The high wbc is a little concerning and they will run a cbc to check for infection. However the low rbc is most likely normal you will need ro up your iron intake.