I Have A 10 Month Old Daughter. My Husband Has

I have a 10 month old daughter. My husband has been home with her for two days while I worked and she was asleep when I got home last night. This morning when she woke and I got her out of her crib I noticed a bruise on her forehead and one where her butt meets her leg. I woke my husband who did not specifically remember any falls and seemed as perplexed as I was. Should I be worried?