Easily Bruising and I'm concerned

So I've been on the medicine Humira for maybe a year or less to help my arthritis. I've also taken bc for two years. For the past week or two I've noticed some bruises on my legs but only a dime size at the very most. They barely hurt if at all. I'm concerned cause I've looked up stuff and it has scared me. Is this a bad thing or do I simply run into things and not notice then bruise easily? I talked to my rheumatologist and she said she doesn't see why the Humira would do this but just to watch out and see if I notice more, especially in other places. Pleas help!!!