" I had repeated thoughts where I saw myself being a child (sometimes my mind regresses to that) or other stuff. I brokedown where it literally in my head felt I was going to snap like real physical pain."

I have been hospitalized twice in three years because I was in extreme mania and could not function. This would qualify as what you are referring to as a breakdown. I became a child on both occasions. I did not see myself as a child as in a 3rd person view in my thoughts. (I think that is what you are describing). I was exeriencing the world as a child, had the mental functioning of a child and was behaving as one.
I have been DXed as Bp1 with unresolved trauma and pstd.

"But when it happens my mind goes really scrambled like theres thoughts racing from different parts of my head. I can barely think straight and every thought is negative and speaking is hard due to slurring. It becomes painful in my head to where I cant even sleep. I usually play acid jazz while having a fan by my head to come out of it."

Again, these symptoms you describe are how I experience mania when it's at the extreme end of the disorder. My thoughts are like a high speed pinball machine and I can't keep them from slamming into each other and making random connections. Slurring also occurs for me in this state. Trouble finding words that I have known my whole life also occurs. The first time it happened I called 911 because I thought I was having a stroke ( hadn't ever been diagnosed with any mental illness at that point).

I did not experience physical pain in my head but in the minutes preceeding the "breakdown" level of the 2nd episode I did experience a physical sensation inside my head. I am not sure that I have any words to describe the feeling. Picture two powerful magnets held up to each other only in the position where the polarity would be reversed causing the polar field to repel from one another. The feeling was soft and pulsing though, not painful.
I was not experiencing negative thoughts, I was in a euphoric state of mania and feeling exremely positive.

What you are describing sounds more like a mixed episode that contains both elements of depression and mania at the same time. That is how my therapist explained mixed to me, and reading on the topic has also described it this way.

Everyone is different though and only your therapist or Pdoc could really know whether that is what you are experiencing. Sounds like it to me though.

I have never had a mixed episode that had full blown mania and depression at the same time. I just have hypomania with elements of depression ....as far as I can tell anyway.