### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Hi I have been on birth control for 5 years, First i had the mirena for 5 years then i switched to the depo shot in may and i got another shot in july, im due for another at the end of this month but all of a sudden i started spotting on tuesday, now its saturday and now im its heavy bleeding.... what could this be?

### output:

Depo-Provera (me Chat Doctor.  Common side effects include nausea, stomach cramping/bloating, dizziness, headache, tiredness, breast tenderness, decrease in breast size, acne, hair loss, or irritation/pain at injection site. Serious side effects: 1. Menstrual periods that are heavier or longer than normal; 2.sudden numbness or weakness, especially on one side of the body; 3.sudden severe headache, confusion, problems with vision, speech, or balance; 4.chest pain, sudden cough, wheezing, rapid breathing, coughing up blood; 5.pain, swelling, warmth, or redness in one or both legs; 6.fever; 7.nausea, upper stomach pain, itching, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes); 8.swelling in your hands, ankles, or feet; or 9.symptoms of depression (sleep problems, weakness, mood changes)So change in menstrual bleeding and heavy bleeding are side effects of demo shots. I suggest u to consult your treating doctor if bleeding won't subside.In the meantime 