Sickness..

I've been to the doctors a number of times and I haven't got any help so this is my last resort. Everyday without a fail I feel sick and I'm getting so fed up with it, I even start crying most nights or when it does get bad. I've been taking these tablets what has helped a lot but sometimes it don't cut the night ones off or even the little bit of sickness I get in the day. Can someone tell me what it might be or how I can help it. I'm desperate!