Mood swings. Looking for some help :)

Hello, I don't understand my mood swings, I get angry easily, I am emotional too, sometimes I cry very easily and get angry too. I don't feel like talking to anyone and sometimes I talk a lot. Sometimes, whole day goes well happily and some days I am okay for some time and then something happens and rest of the day I don't feel like talking to anyone. From past many years, I am facing family problems, trying to ignore but it is not possible now, In relationship also, there is no peace. I am not understanding , I feel because of my mood swings these things are happening and I don't have best friends, they all talk to me whenever they have some work with me. Never be with me when I need them. I have started living alone, I hardly talk with them, I hardly talk to anyone, only related to my job. I work as a diet consultant and I always try my best in my profession, there is no such incident where I behaved bad with clients. Looking for some help :) Thank you , have a good day.