(Sorry if the post is long and too detailed and rambly I’m not good at making short posts.. I am in the UK btw)
 
Hi, I (19F) don’t have a BPD diagnosis, but for a few years now I have suspected it and not really said anything to anyone, it’s just been at the back of my head since it (whatever is actually wrong with me) caused me a lot of issues previously when I was about 16, but got less bad for a while after I cut off mostly everyone from my life.
 
I thought maybe I had gotten better and was just immature, but since I have reconnected with my old best friend, things have become much worse to the point we both believe I need professional help badly. Since his schedule has become busier, I have been constantly causing insane arguments, becoming hysterical, threatening to cut him off, blocking him, thinking about suicide etc because I just lose it with anxiety that he’s forgotten me whenever we don’t talk for more than a couple days or whenever he tells me he’s busy. I managed to get out of my SH habit a few months ago but these episodes are making me want to do it again a lot. Every time he doesn’t respond to my messages, changes his tone, doesn’t respond when I speak to him etc, it’s like this pit forms in my chest and I feel like I wanna die or get overcome with rage. You get the idea, something is obviously wrong and I really feel like it is likely BPD after researching it, reading BPD posts and advice etc.
 
There’s a lot more issues than just with this friend, but this issue is the one having the most severe impact on my life rn, and I don’t wanna detail my whole life in one singular reddit post
 
I’ve booked an appointment with a GP to try and get a referral to a psychiatrist, and I have a phone appointment, and the doctor can either request to see me irl if she thinks its necessary, or refer me to a psych.
 
My question is, what do I even say? How do I open? I’ve never even been to a doctors appointment generally by myself as I’ve not really been sick since I was younger.
 
I have autism and social anxiety so I really am stressing over what exactly to say. Should I bring up BPD straight away? How do I start talking about my problems? Will they be reluctant to diagnose me because I’m autistic? I’ve heard the two have overlapping traits but I know it’s not autism causing these issues. I never used to be like this, and autism shouldn’t be causing such major issues that cause me so much distress and fear and are destroying my life.
 
Like I said, I have a very strong feeling it is BPD but really even if it’s something else, I definitely need help with it. I just really don’t know what to even say. I don’t wanna come across like a hypochondriac or like I just **want** to have BPD for some reason. I am serious about this and need help and this seems the most likely lead. 

Does anyone else have experience with this? Could anyone give me any ideas of what I should say exactly? Should I bring up BPD? How do I bring all this up? Will a GP take this seriously? I really am desperate for a referral and confirmation. Thanks guys