URGENT

Lately I have noticed continuous bruising on my legs.( past few months, getting worse too) There are no way I am knocking my legs as in my daily life there isn't any reason for my legs to get knocked about and if they was I'd realise. I've been really tired lately and my legs have been achy. I'm generally worried but I don't want to go to the doctors just for bruising. Anyone have any ideas what this could be or has anyone experienced this too? Thanks in advance x