Very Strong Attachment To Mother And Subsequent Loss Cause For Borderline Personality Disorder?

From the list of symptoms I’ve read on the Internet, I think I may well have Borderline Personality Disorder. My moods fluctuate VERY wildly, and for very little reason – any small thing can be a trigger. Also, I get angry easily (crowds anger me most). Rather than go in depth listing my symptoms, I just want to know if this could be a cause of it.
Up until I was 15, I was very, very attached to my mother. In fact I was in a ‘bubble’ and didn’t really go out, and relied on her for everything. When I was 15 she died of cancer, which until the last week when she was ill was hid from me. I hardly reacted at all to the event which was a big shock to all my family, even though I was distraught – my emotions just wouldn’t come out. Since then, I became a much different person. I seemed to completely change – I basically thought I had no future before – due to childhood issues I didn’t even attend secondary school. But before I knew it, I had a diploma from college and a 2:1 degree from University.
But, something has been wrong the last couple of years, and it’s been slowly worsening. I’m now 21, and I have all the symptoms of BPD and it’s wrecking my life. I just want to know if that was a cause, to maybe help me understand it better. I plan on seeing my GP soon who will hopefully refer me to a mental health expert.
Thanks