Help a girl out :(

I'm 17 and I'm 7 weeks pregnant. I've booked a consultation for the 31st of august. I am so nervous and I just don't know what to expect, I don't think the dad is going to come with me. I'm terrified that this will really effect my mental health as I struggle with a personality disorder anyway. I don't want to have an abortion but I also know me and the father aren't ready to be parents and we both want to finish our education and travel etc. I feel so torn and am worried I won't go through with it and then be an awful mum and hate my life, or I do go through with it and get depressed and regretful. If anyone has had an experience like this a chat would be appreciated, thank you x