hi lisa ;
Depo is a shot used for contraception
.The action of one shot lasts for about 3 months after that it will go away.Till the action of Depo is present you will not become pregnant.So wait for 3 months to finish the effect of Depo then you can try for pregnancy
.The sick feeling may be due to hormonal
effect ;it will go away soon then don't take another shot as you want to have a baby.