I've booked an abortion

I got a positive today and works out I'm one day off 5 weeks pregnant. I have no home, a job that ends in a couple of months and no partner to support me. At this point in life I do not want to carry a child. I'm 100% sure.

My appointment is in 1 week. They said I would be there 4-5 hours?? I'm going to have to pretend to be sick to get the day off work as it's a day I'm booked in with clients. I thought it was just pills that would make me bleed? I just want it over with. I'm so unhappy and wish I could just hurt myself so I wasn't pregnant anymore. Is there anything I can do to miscarry?