Period but no blood . . .?

I feel like I have my period, but I'm not bleeding at all. I haven't had my period in three months . . which doesn't bother me much because, I'm usually irregular. I'm bloated, I want sugar and salt and all the cravings. Cramping too. This isn't a pregnant thing, I'm still a virgin. :/ So, should I be worried? This has been the longest time I haven't started as well. . . :(