Feeling miserable!!

Joanne • Im 28 ive got 3 children son 11 daughter 10 and daughter 5 to previous relationship in a new relationship with baby #4 :) n hubs #6 will make our familly 11 woa :)
Im 10 weeks pregnant havnt been sick in 5 years and in the last 2 months ive had 2 colds and gastric bug..on top of my all day morning sickness and fatigue is my amune system not working properly?? So over it :(