For about a week or two, ive been very nauseous, very tired, cravings all over the place, headaches. im not sure whats going on. ?

That's too long...: A doctor can evaluate if nausea symptoms last more than a couple of days. Nausea can be due to many things, such as: stomach virus infection, other viral infection (such as flu), some bacterial infections (such as strep throat), acid reflux (heartburn), gastritis (may be H. pylori), gall bladder or liver disease, certain cancers, pregnancy, kidney diseases, anxiety, depression, medications,...