Bereavement

Hello

my Dad died 3 days ago of lung cancer. Even though I knew he was poorly I never expected him to die just a few days after I saw him. My mum was with him, he had a pulmonary haemorrhage and then died. My eldest Sister has always manipulated them and controlled them  like they are puppets and unfortunately I have never felt loved by my parents. I’ve never been able to do anything for them because they wouldn’t let me. I have 3 sisters in total but as far as my mum and dad are concerned it’s always felt like they only have 1 child and that’s my eldest sister. I feel bitter and angry but relieved that I could finally shout to my dead dad today how I’ve felt all these years. I’m concerned about how detached I feel. Is this normal? Do you think I need to see a counsellor? Thanks for your time 

Sandra