E.W.
I agree with all the other moms. It might be a urinary tract infection. Bring her to her doctor right away and have them do a urine test to check for any infection. My daughter had it also when she was 7 months ( we ended up in the hospital) and it recurred at 9 months on early detection. Don't wait for the fever to come because she will have a real hard time. If she has UTI they'll give her an antibiotic and she will feel relief right away. Lay off on the juice except for cranberry and coconut juice cos those are good for prevention of uti. And of course lots of water. Next thing you have to do is just work on not letting it recur. I hope she feels better.