It is certainly possible that you have become pregnant if you still haven't had your period. The only way to know for sure would be to get a home urine pregnancy
test and check. The pull out method is not very reliable, and condoms are usually reliable but occasionally there can be failures. I would advise that you check for pregnancy first. If you are not pregnant, and the symptoms continue, see your doctor, as there may be other hormonal
problems. Sometimes people have hormonal symptoms after they stop using depo, but they should resolve within a few weeks as your body gets back to normal. I hope this was helpful, please let me know if you need any more help.