is a reversible method of contraception
in the form of injections.
For maintaining the contraceptive
efficacy, you need to repeat the shots every 3 months.
As, you haven't taken the injection in Feb., there is a possibility of pregnancy
and your symptoms might be related to early pregnancy.
But for confirmation, you need to get urine pregnancy test done.
Hope this information is helpful.
Dr. Mrs. Sumeet Baheti