I came out on wednesday i seemed to get a great reaction i just found out today that my mum actually took it horribly and started blaming herself and how ive been brought up!
My mom was pretty shaken--not that she didn't approve or loved me any less, but it hit her really hard. I wrote an email to my parents and sister a week after I came out to them, when I was back at school, explaining that this is just as much a part of me as my eye color, love for sports, and having ADHD. All of those things are pretty natural parts of who I am. She never said anything to me about the email, but I know she talked to my dad and sister about it. Just give her time to adjust. You can do what I did and subtly encourage her to continue the dialogue but don't force it on her.
Remember, your mom is going through the standard steps of loss (of you as a straight person), but hopefully her love for you will overcome it and she will come to accept it. You should definitely tell her not to blame herself or think this is even blameworthy.
I think her reaction is probably the same when you first realize who you really are. Honestly, she is going through the same thing you did before. All you can do is to give her the time she needs, and give her some space to sort things out.