Progesterone

Rachel • I`m 25 from Florida and TTC baby #1 with my wife.
I am 3 days post IUI (5th and probably last IUI) and took my first progesterone capsule last night. I woke up feeling almost like AF cramps and pressure in my lower stomach. Is this from the progesterone or the Follistim or Ovidrel trigger? I've had this pressure/pulling feeling since the IUI on Monday.