Can allergies(kinda long, sorry.)

Cause vertigo? I went to the doctor's a few years back because I couldn't function. I was so sick. Stuffy nose, sore itchy throat, pale, nauseated, couldn't eat or drink, dizzy, etc. I ended up puking for like 2 weeks straight. The doctors hooked me up on an iv-said I was malnourished and dehydrated. They told me they didn't know what was wrong and prescribed me basically a stronger dose of claritin-that didn't help. Now I'm feeling the same symptoms. Could these be allergies or a totally different issue?