 [ Symptoms ] no period after only having one depo shot i got the depo shot on sept 15 2012 in oct i got a period and also in nov i decided i did not want to get the shot which i had to go in on the 7th of dec to get it i did have intercourse on the 6th of dec and it was unprotected i was expecting a period on the 24th of dec and it did not come i am afraid i may be pregnant but i keep getting negative is i just want my period to return and i have been to two dr is that say it is a side effect of the shot but why after 3 months no period [ Disease ] in my opinion you should check for sinusitis also check for eye infection  can cause serious problems if left untreated good luck