Is there a way that I could have minor symptoms of boderline personality disorder, but where it's not completely effecting my everyday life?

I would like to add information to this........Bipolar disorder may run in my family. If it does, I really wouldn't know. My sister does have Boderline Personality Disorder. It affects her everyday. I am a very intelligent person and I'm in college. I've always took care of my family and held them together and now I'm living with my fiance. It was getting a little too overwhelming in my household. But lately I've been emotionally unstable and it's kind of scaring me. I'll start arguments over nothing and then I'll start crying for no reason and then it will shift and I'll feel just fine. I was just wondering if there a was a way you could have a mental disorder, but not as strong as with most cases. I am very serious about how concerned I am. If I have minor symptoms now, it could get worse. Also, my emotions get so mixed up that sometime I can't even get my work done. It's like I just don't want to do it. I can concentrate enough to learn and I'll begin feeling tired and just get so angry that I can't learn it that I just give up. This is effecting my schooling tremendously. I was told to speak to a psychiatrist, but I don't have the money or transportation. So this is my last resort. Thank you for your time in even reading this comment if you do. Anything would help.