My Future sacrificed for those who just don't care?

I am ready to kill either myself or them. this may sound disgusting to you however My future has been sacrificed for these kids.It is very difficult for me to word as i am so angry and don't know this so please do not Judge. I take Drama and My drama teacher assigned me the only 2 SEN kids in our entire class. We have had this drama assignment for 3 months and it is 60 percent of the overall mark. I also have had a 50% Re module today and A 50% science module tomorrow. I also have 2 other kids in my group both of who just mess around. My drama teacher has told me That i will get extra marks for helping the other kids. I do not see how this is possible. I have spent the last week writing the entire script even though we were each supposed to do a part. I have had to sort out the lighting the music the staging, The backgrounds, the costumes the props. The list is endless. The infuriating thing is none of them ever come to rehearsals and can never give a reason why. One of the people in my group is known by the whole school for making up elaborate Bullshit (for instance he once told our english teacher that he was late because he was on holiday and whilst the were going home his mothers lung exploded on the plane and they had to land the helicopter on the plane to get her off it WHILE the plane was flying) My drama teacher just laughs it all off but while they have all been revising and messing around i have been working my *** off into the small hours trying to get some revision and the drama pay done. For instance the script is 23 pages long however it is very difficult to wite such a long script when two of the character are incapable of learning more then 3 lines of words. I am really worried i am going to fail not just my science but also this drama as neither of them can remember when to ssay thier lines or move where or everything. To cap it all of all 4 of them have missed many lessons and have had arguments and tantrums and refusing to so the play. Accusing each other of bullying etc. Its been a nightmare. My drama teacher is no use as he is one of those egotistic art obsessed maniacs who only cares about his subject and does'nt care what implications it may be having on other subjects. Whats more infuriating is that only one of the Kids actually has a medical disability. The other has confessed to everyone that hes just really Dumb. THis is not a hate campaign on those with special needs i have just been bottling this up for ages and needed someone somewhere to know. Has anyone got any advice on help for this drama thing? could i perhaps confront the teacher and let him no what a negative effect this has had on my life. I am so stressed and tired from all tihs extra work i have become disorientated and recently came up in a rash which my docttor attributed to stress. Can anyone help me please i feel like my career as anything has been sacrificed. Please respond quickly this is rather Urgent :(