Someone please tell me I’m overreacting

My daughter goes to a well known daycare in the US. I’ve been a bit bothered for a while because I notice that she gets pretty bad diaper rashes. When she’s home for days straight (long weekends, vacations, and before starting daycare) she NEVER gets rashes. They supposedly change her every 2 hours, but my fear is that with so many kids (12 kids and 2 teachers) they don’t notice when she poops and she sits on it for a while.

My main issue is that today she came home, I went to give her a bath and notice a few scratches in her belly. No incidents were reported to me. She had one of those in her arm last week but I didn’t think too much of it because I thought it was minor. Now today seeing her belly and chest I feel a knot in my stomach. What do you girls think? She’s extremely fussy today which is not like her…