Baby feeling sick

So I’m going to call the doctor, but just figured I’d ask for some advice here before freaking out. My daughter is about to be 12 months in just a few days, but the past week she pooped 2 times and at the end she had a little blood on her anus. I assumed it was just from a tear because she was straining so hard to poop and it ended up being hard. (I’ve been giving her more food lately trying to wean her). That was a few days ago and she hasn’t pooped again yet, but yesterday I could feel she was a little warm and a little needy and just wanted to be in my lap. Well today she woke up and with a rectal temperature of 101.6 and pretty cranky but she’s playing now while watching trolls. Any advice on what it could be?

Update: she pooped today and there was no blood, there’s still a fever and still being cranky.