Would it be appropriate to consult a therapist in my case?

I’ve been rather down in the past year or so and in the last eight months I seem to have taken a turn for the worse, family and friends and a while ago teachers at my school have told me that I should consider some therapy sessions, but I don’t know whether I will really be able to sum up the courage to go through with it. I feel as if the trouble I have been having is too insignificant and I think I would feel foolish if I wasted a therapist’s time on it. I actually even feel rather foolish writing it down here on fluther. Could that just be out of denial?
I just feel pretty overwhelmed in general, and there are weeks in which I find myself crying three or more times, then better “episodes” in which I rarely have to cry. I think it’s just stress, there’s been a lot going on. Nothing really bad happened, I’ve just had a lot on my mind and the crying seems to be my output for all that. I think this will pass, but I’m not sure and it is a rather large burden for my SO, as his mother has bipolar disorder and he was alone with her during his childhood. He always had the feeling that she was sad because of him, and that makes it pretty hard for him to cope with tears and sadness, or maybe depression. And being a burden for him just makes me feel worse, creating a vicious circle. So what I’m asking is, do you think I could do with some help? Or should I just wait and let it pass?