I would go see your gyno and get some hormone tests done. It might answer a lot for you, not only about the missing period, but also about the lack of sexual activity, (if the latter is not caused by something obvious like hubby being deployed). Good luck!
it could be a change in life style or diet it also could be a change in medication or it could be a psychological condition in where you body wants to be pregnant and you mind follows you body and tricks it into thinking you are pregnant very rare condition very few documented cases if you continue missing your periods i would contact a doctor even if it at a free clinic if you dont have insurance hope this helps carruff