He sounds like the crazy one. Don't let him hook you into arguing with him. You cannot change his attitude or actions! Give him whatever information you need to give him and then say good bye and hang up. If or I should say when he calls back say good bye again and then don't answer the phone. We can only get into an argument if we allow it to happen.
Man, do I know this from experience!!!!It's taken me years to learn how to not argue with my daughter.
Start out by telling yourself over and over that you will not respond to his craziness. Say it again before you call him and then stick to it. Tell him the first time that you will not argue and that you will say good bye and hang up anytime that you feel uncomfortable. Then stick to it. Succeeding will take time and practice.
Also tell yourself over and over that you are a good person and that what anyone else thinks or says does not change that. You don't have to convince anyone of anything.
I wonder why you needed to tell him that your daughter had a period considering his long time attitude of disrespect. Provide your daughter with supplies for her to keep in her back pack ready to use when she needs them. Don't tell her to keep it from him but she doesn't need to tell him either.
It is so sad that girls are maturing so early. It is a fact for all of society and although there are theories as to cause no one actually knows why it is happening. There is nothing that you could've done to cause it to happen. If he doesn't believe that it's his problem. Don't let him put it on you.
Talk with your daughter about having periods and even suggest that her father doesn't understand. Warn her that he may be angry and that if she's uncomfortable she should call you to pick her up.
Do you have a court order specifying visitation times or amounts? If not your daughter doesn't have to visit if she doesn't want to do so.
If you do you'll have to follow the order. I would suggest that you document the difficulties that your daughter has and return to court to get it changed. Do this especially if your daughter doesn't want to visit.
Keep this conflict between you and your ex. Do not put your daughter in the middle. Don't ask her to choose but tell her that you want to know if she's uncomfortable about anything and that most things are more easily managed if she will let you know what they are. Keep communication open.
As to after school care, if you are the custodial parent the choice is yours. The divorce decree may give him the right to make his wishes known. If you do have a legal decree take it to an attorney and have him explain what you can legally do. If you don't have a court order now would be a good time to get one especially if you think your ex will file. Being the first to file has advantageous. Legal Aid will help you on a sliding scale.
I wish you well. This is a very difficult thing for you to deal with. Please ask me questions if you wish. I have had some professional and personal experience in this area.
After thought: One way to document is to record phone conversations but do it only after you are able to remain rational. I found that knowing I was recording helped me stay on track.