One way of confirming your hip strain is to test it at home with a stretch or contraction. Using a slight stretch: sit on the floor with the soles of your feet together and legs apart. Is there pain as you progressively push down through the knees?
Using resistance to contraction place a firm object, like a ball, between your knees and squeeze. If this hurts as well it’s a strain or chronic injury to the adductor muscles.
Help the healing process by laying off of the activities that cause a painful response and incorporate ice and rest into your rehabilitation. Ice the area that hurts 3 times a day for 20 minutes to help decrease the inflammation and help the muscles to heal faster.