During the first two shots, I lost 7 lbs, but after 3rd shot, I’m so sleepy, starved, and constipated, and 5 lbs came back

Help... During the first two shots, I lost 7 lbs(I wasn't hungry at all), but after 3rd shot(after my period), I’m so sleepy, starved, and constipated, and 5 lbs came back. It is common, or it's just me ((