2nd tri and still getting sick: help!

Heidi
I'm 15 weeks and very happy to be over the all day nausea! However, I'm still throwing up about 2-3 times a week in the mornings. I wake up and eat Cheerios before I do anything. Does anyone have any suggestions on what to do? I can function and feel fine after I get sick. I'm just tired of actually getting sick.
Also, I'm still fatigued. Not as bad as the first tri but tired. Please tell me how to get over this!