Id blow her phone up lol it's sounds normal to me, as long as there no pain or heavy bleeding/clots you should be ok but still try to get ahold of her. Have you lost your plug yet? That could be part of it.
I just turned 37 weeks too and when I was checked I didn't bleed too much but when I was checked the first time at 3?
I think they must of been rougher wit you this time but I think its normal to have occasional spotting throught the day