Strange bruise

crystal • Me and my husband have beeb togetger for over five years just married in february of this month and have been trying on and off to conceive for over three years.
I woke up this morning and discovered that I have a huge bruise on my breast it wasn't their when I went to bed last night.......its kinda freaking me out it's really sore and I don't know how I got it.... Has anyone had this happen before any ideas or suggestions