hello, im looking for advice on the injection. i have been on the injection for 5 months the last month of my 2nd injection i was on and off bleeding 2 days in between for 16 days. i have now stopped the injection 13 days ago, and my GP prescribed me progesterone pill. but i have not been taking these as i want my cycle to go back to normal, but for the last 13 days i have been off my injection i took 5 pills for 5 days then stopped but for the 13 days i have been gettin headaches back aches, pains in my stomach and feeling really sick in the mornings, is it pregnancy or is it the after effect from the injection? im only 18 and im really confused.