Hi! I Have Been On The Depo Shot For Over

Hi! I have been on the depo shot for over 4 years and never missed a shot. I got my shot on 6 March and had unprotected sex on 23rd March. I took an emergency contraceptive on 25th March. I am now experiencing light headaches/dizziness for days. What can it be?Hi! I have been on the depo shot for over 4 years and never missed a shot. I got my shot on 6 March and had unprotected sex on 23rd March. I took an emergency contraceptive on 25th March. I am now experiencing light headaches/dizziness for days. What can it be?Hi! I have been on the depo shot for over 4 years and never missed a shot. I got my shot on 6 March and had unprotected sex on 23rd March. I took an emergency contraceptive on 25th March. I am now experiencing light headaches/dizziness for days. What can it be?