If you are due for the injection in few days, it is likely that you could be having withdrawal symptoms
, more so if you have gained any additional weight after the treatment. Also, protection may dwindle especially toward the end of the course, when there is weight gain because the body requirement of the hormone rises with weight and contraception
is no longer effective. So, as your symptoms suggest, you should also exclude/confirm pregnancy
through assessment of the serum beta-hCG
titres. Hope this helps.