Getting headaches, feeling light headed and sick in the stomach. Eating a lot.

When was your period due? Have you taken a pregnancy test? Have you had unprotected (besides the shot) sex in the last month? No one here can tell you if your pregnant, however we can advise you whether it is a possibility with a little more information...

I don't know when it was due as I haven't had a period for a long time as I have a 2 year old. Yes I have had unprotected sex as we have been trying to have a baby, I have done a test but wa negative I am just having the symptoms.

Well, it could be too early for a pregnancy test to register. Seeing as you are unsure about your period, I would say the next step is to wait another week. If you are still getting a negative, and your period has not come, call your doctor and request a test through them. When you come off a hormonal birth control like depo provera after being on it for a time, it can take a while for your body to "restart". It may even be necessary for your doctor to prescribe an oral BC just to get you re-regulated.

If you were pregnant (and I'm assuming you started trying sometime in the last 4-6 weeks) you most likely would not have any physical symptoms other than a missed period. Typically pregnancy symptoms do not start until 8 weeks along, at least. Good luck!