Probably just digging for the last ounce of hope!!

Went for a walk with my husband and by the end I was having a terrible pain in my left hip/groin it was so hard walking back and then getting up the 4 steps to the house I could hardly do it I didn't sit down when we got in as I had to wash the dog (bloody animal rolled in fox crap) anyway it stopped hurting as soon as I stopped walking and is fine naw....I've never ever had this before could it be a sign that I am pregnant, af due on Tuesday, thanks for any help