I think I pulled a tendon/ ligament in my foot around my big toe?

I need help healing it. There is minor swelling and it hurts to touch and put pressure on it. I have to walk and go to school and i don't know what to do because I have to walk around to my classes. I tried icing it and all but it's been about 2 days and it hasn't gotten better. I've tried advil, heating, and icing it. Should i wrap it or use crutches? Thank you!!