I don't know what to do

December last year 2024 I just got fired and I am really upset by this due to this being the beginning my first year in that field. I was so excited to start and i've never gotten any other good news like this before and it hit really hard to get this news of being fired. I tried really hard to do everything right but I some how was not focused and I threw something in the bin that was supposed to be processed. I don't even remember doing this and now I am paying the prices by my stupidity I don't have a job for 2 plus months now and that job was everything to me. I finally got a job I was proud of doing. and now it's gone. I have applied at other jobs but cant seem to get anywhere right now as all the other places are expecting me to at least have a certificate 4 but I am only doing the certificate 4 now. and won't finish until the end of this year 2025. my mind is constantly hurting me and just can't seem to stop putting my issues on other people i get angry really fast and once someone upsets me I just start crying and walk away from them cause I don't want them to deal with me. so please help me what can I do to stop my mind from overthinking things. I have tried psychologist but they just seem to shrug my issues off like I am just there for attention and more work. like I have a decent life so I just don't know why I feel like this all the time. During 2023 I also felt like this over my family they are constantly fighting and they never stop. so I told them if they don't stop then I will leave and not come back. December 2024 new years eve my brother started fighting again after a decent year of finally being together with minimum arguments, my older brother gave my little brother a black eye. then also knowing I don't have a job my older brother stole from me that wasn't the first time but the first time since I started trusting him again. so now after trying to trust my older brother through 2023 and through 2024 I have now given up on him and I had to block him so now I feel like its done and I can't trust him again. 2025 is clearly not my year. but at the same time 2024 was the only good year I have had. and now it just seems like nothing will ever get better as I blew my only job I was proud of and I have given up on my own family. my younger brother constantly thinks we stare at him and is always calling mum and myself a B**ch and all other types of words but I have heard this all my life it only really annoys me when someone else out of my family tell me this cause then I just start believing it. my girlfriend just call me a coward after getting upset by a math question in my certificate 4. but I have math issues all throughout school and it just makes it 10 times harder for me to work when I already know I am not good at math I have tried really hard but these are alway my set backs. but I need to do this for the job. so I just can't quit. but I just need someone to tell me how to go about this year. cause I feel like this year is not going to get any better. I am sorry for all the writing but I just really need some help. I also love my girlfriend a lot so I believe she was trying to say something nicer but that just came out the way it did. I know she didn't mean it to the extent I overreacted. she's one of the best things in my life. She also wants me to get help in trying to find solutions in dealing with my emotions which is why I am here now.