Late period..


I've been waiting for 11 days for my period (I'm 11 days late) I haven't been spotting or having signs my period is coming and I've never ever been this late! The last time I slept with someone was a month ago but he didn't cum inside me and it was protected sex. I am not on any pill/implant or anything but there isn't a possibility in site that I'm pregnant. I've been depressed and anxious recently but haven't done any heavy lifting or stress related work other then breaking my fingers coming off a horse 2 weeks back which winded me in my stomach. I do train horses which is tiring but has never interrupted my period in any way. What's Wrong With Me!?!?