Are the lumps under the bruises?
I have bruises all the time that I have no recollection of getting. Sometimes when I think about it, I will vaguely remember doing something & thinking, "Oh, that's going to leave a nice bruise!". And I have little kids & a dog, so it's not uncommon to bruise from something they did & not even realize it. I actually have a bruise (with a slight bump) on my thigh right now -- no clue what I did to get it, but again, vaguely remember doing something to that area.
If you're really worried, can you call your doctor's office & speak to someone? I've called the doctor's office & asked her nurse questions before when I wasn't sure about something.