Help! I am always sick!

Does anyone have tips or tricks to help keep the nausea away? I have been taking a prescribed medication for pregnancy that is supposed to remove all the nausea and vomiting but it does not always work. I wake up every other day running to the toilet with barely anything in my stomach. A lot of dry heaving and occasional stomach acid bile and still trouble eating or drinking after. I keep soda crackers and water by my bed that I reach for the moment my eyes open but some days it just comes right back up. Any advice would be greatly appreciated!