really need to vent

So I have this best friend that I have known for 7 years. A while ago I took on watching her one year old everyday and I have a 4 month old I just recently told her that I thought it was best that I did not watch her anymore for the fact that her kid use to hit my baby all the time and would throw toys at her head and every time she would go after her it was her head . And just got more and more mean everyday , doing this I noticed that me and my friend parent completely different in a lot of ways like she doesnt believe in vaccinations and I do , and she doesn't believe in disciplining At all so when her baby hits my baby she just tells her she has to be nice in the sweetest voice she has and is holding back a smile like no that is not okay . Anyways I texted her telling her that with winter coming and it going to be flu season it would be best if we didn't watch each other girls and the simply fact that my baby already has a super bad cough. I have no idea how to tell her that her baby hits mine and I am just not okay with it cause I am beyond upset about it and she can never get off work on time so I was pretty much always late to work everyday to the point I was gonna get close to loosing my job (I got her a job at my work to help her out ) . Anyways she is at work talking all this crap and I'm pretty sure mine and her friendship is over now ... do you other mommies think I made the wrong choice and please tell me what you guys would have done. Sorry this is so long I left some parts out just cause it would have been way too long...