Is it normal to lie about serious things

When i was in my second year of secondry school i told my friends that i had schizophrenia and i started bringing tic-tacs in 2 school and saying that they was my medication. When i thought that they was getting suspisious, i started brining in my brothers meletonin tablets and saying that they was my new medication. They dont know the truth about it yet but im not letting them know.

Then in my third year of secondry school i told my friends that i had a bf (like most teenage girls do) but then, i started telling them that he abuses me and that he raped me. I thought it all through and i was harming myself to make it more beleveable like hitting myself with hard objects to make bruses . I didnt know how it got so bad but it did. The teachers found out because my friend got concerned about me and thought i was pregnant. I eventually told them about that lie and they were mad 2 start of with but then they started 2 forgive me. The teachers thought i was doing it for attention and that i was lonely but i thinkvits something else.

But the thing i want help with most is that i still keep on coming up with lies in my head 2 tell them. I dont tell them tho coz im trying 2 stop. Please help x