20 weeks and miserable...

I hate being so miserable. This is my 3rd pregnancy and with my first 2 it was nothing like this. The Dr has said this one is more of a riskier pregnancy from the beginning. I am always in pain and exhausted. I try so hard to be a good sport for my husband and our two kids but days like today I want to crawl in bed and hide. Does anyone else have bad nerve pains or is going through I rough pregnancy? Do you have the blues too or are you finding ways to make it easier?