I had a hysterectomy 1 month and 5 days ago and I have a really hard spot all across my incision?

I was wondering what it could be. My dr says it is probably fluid build up, but its just getting worse and I cant get in to see him until this weekend and I really dont want to run to the hospital over something this small. Has any other female had a hysterectomy before and if so did you get the hard spot(s) across your incision as well? By the way I am not on any hormone therapy because all they took was my uterus and nothing else.