Feeling terrible!

Hi all! I'm 9 weeks and 3 days with baby number 3 and I just feel miserable! I'm so exhausted all the time, it's a feat just to shower.. I'm always nauseous and find it difficult to eat.. I just all around feel like crap! I'm also very irritable. I feel even worse because my husband and mom are picking up so much slack with my almost 1 year old, I feel kinda useless, though I do also work full time. I didn't have this with my other pregnancies! Anyone else feel so terrible??