Hi. I Don't Know What Is Wrong With Me Lately.

Hi. I don't know what is wrong with me lately. It's like I realised I have a problem. It all began from December last year when I was 15 and I wanted to end my life. I wasn't suicidal before. I guess I'm still not now because I haven't tried sins that one night in December, I do not self harm either. I do have thoughts about it. I wouldn't say the whole time but often. I always find myself listening to sad music and think of myself dead and what my family friends or people would do or how they would react which leads to me crying. That's used to be strange for me but now it's like once a while thing. I cry often. Im 16 now I'm a happy outgoing girl but... Im not? I cry over silly things, I put myself into bad moods, I overthink. I just don't know.. I was in school counciling from December to may but I haven't been back. I dont know whether I should ask for help?