Can my headaches I've been getting every day lately be coming from allergies? I'm allergic to a lot of stuff, foods and environmental and cats,

Allergies can. Definitely cause headaches. You should be under the care of an allergist especially with your history of multiple food allergy, animals & environmental triggers. Also need an Epipen (epinephrine) at your side at all times. To improve your quality of life, you should already be taking some oral histamines and nasal sprays. Consult with your physician for referral to allergist.