From a physiological standpoint, there is a lot of hormonal fluxuation with pregancy and miscarraige. It takes time for your body to find equalibrium. I am a little suprised your doctor put you on zoloft so soon. Talk to your doctor about going off the medication; sometimes zoloft can actually make things worse.
From an emotional standpoint; you have been through quite a shock. Learning that you are pregnant is suprising enough. Your experience was truely traumatic, and I am sorry this has been your experience. It is not surpising that you would have a myriad of emotions from this experience. Don't be affraid to experience those emotions. You might consider a counselor who can help give you the tools to sort through these emotions and your experiences.
As time goes on, it will get easier. Oh, and about the food. After having my son, my food tastes changed. Foods or flavours I used to like were not so thrilling and foods I hadn't ever cared for I suddenly loved and still do years later. I was pretty weirded out by it for a couple of years. Now I just shrug it off. ;)
I hope you realize that what you are experiencing, the anger, the saddness, the frustration, the confusion; these strong emotions are completely understandable for what you have experienced. Please be patient with yourself. Allow yourself the time and space you need to process through all of this. It will get easier.