Concerns regarding depression / anxiety.

I've been facing some sort of depressing concerns with uncontrollable crying for like 2-3 times a week which was almost everyday earlier. Also facing some emotional breakdowns occasionally. Along with that, I used to get shivers near my lower abdominal area which again got quite less over a period of time. Due to these things I've been unable to concentrate on my studies. Another slight concern is about the suicidal thoughts, which is not a big deal as it happens really rarely that too for some amount of time and then it disappears. I'm becoming a bit short tempered lately too and trying to take it out on some people. I don't know if it's a complete normal thing or not, but I'd love to get some advice if i should visit a doctor or not.