It is unusual not to have had your period this long after your last shot of depo. However, sometimes it can take up to 9 months from the last shot before your periods return, and that would be in march of this year. If your period still doesn t return by then, you need to see your doctor to get tested for other hormonal disorders such as thyroid hormone, prolactin hormone, and others. I am not aware of any connection between colic and the hormonal disorders that can cause a delayed period, However, some thyroid disorders may cause bloating. So you can ask your doctor to check for that. I hope this answers your question, please let me know if you have any more questions.