I'm so sick and tired!

I'm tired and sick of being sick. I'm almost 13 weeks and I'm miserable. I vomited 3 times today and I have been running to the bathroom and dry heaving every hour. I'm so exhausted and I have a huge headache and I just can't take it anymore. My doctor prescribed me diclegis at 8 weeks and only made my vomitting worse. I've had a few good days where I've been able to eat something small here and there but it's not enough...I just don't know what to do anymore. I haven't been happy about being pregnant my entire pregnancy and it sucks. I just want just want to be able to find some joy and enjoy my pregnancy.