I am sooo sorry to hear how you are feeling. I will be 16 weeks tomorrow, but went through exactly the same thing you are going through now, till just a few weeks ago. Everything I ate or drank came out. I couldn't really control it sometimes when it was coming. It was really really hard and I felt quite miserable all the time. I probably wasn't as bad as you, in that I didn't have to go to my doctor for any medication, but I felt awful almost all the time. I think it's the hormones, the anxiety of crossing that 12 week barrier and just that your body is always too tired to recover really. The only thing that helped me was getting Acupuncture treatments regularly.
I have been seeing an Acupuncture lady all through the process of TTC, and have been going throughout my pregnancy so far. I do find that that has helped quite a lot. I had a friend at work who was also going through the same thing, and I recommended her to see an Acupuncturist and she thought it really helped ease her sickness too.
There is light at the end of the tunnel though! Hang in there. As soon as you cross the 13 week or so barrier, you will start to feel better hopefully! You won't feel as tired and your energy levels will definitely be heaps better! Once you get to that stage, you will definitely be able to enjoy your pregnancy! Just be positive, try and think happy thoughts for your little bub growing inside of you!
Good luck with it all!! xx