Is my iron deficiency severe and dangerous?

Patient: I am on implanon (implant contaception) and have been menstruating for 4.5 months.I was anemic before this and now I have sever signs of Iron Deficiency Anemia such as headaches daily, extreme fatigue, dizziness, vision problems, white gums, pale face and sunken eyes, very pale nail beds, severe lower leg pain, chest pains and fast heartbeat. I just want to know if this is serious, because I have no insurance and cannot afford to go to a doctor (unless absolutely necessary). Thank You!