Can you start pulling HER hair out now??? This is SO hard on you, not having at least a time frame!! Mares are annoying to foal out when you know the exact time of conception, but THIS is beyond bad!
One year, I was stuck in HORRIBLE traffic in the parking lot at a NASCAR race (not my favorite pick of places anyway..) in the rain (not great weather for a NASCAR race...) 250 miles from home, and my non-horsey neighbor calls to say my mare is acting funny, and she thinks she is foaling. GREAT!!!
Turned out to be a false alarm. I could hear Molly(the mare)laughing ALL the way from Dallas!!
I think you should only check on her when you feed, and don't take your phone with you. Act VERY cool about everything. Go hm-hmmm-hmmm while you walk around, and just sort of peek at her udder, then leave. You do not care if she has a foal or NOT.