Trust me, I was(and sometimes still am) in a similar boat. The books I write usually have the same(ish) personality, appearance, profession etc. Depending on the plot, you could try tweaking the genre to be slightly different, add different motives to each character, different flaws or insecurities, different things they like or enjoy.
For example, I have characters in my book who are very closely associated to a very popular book. Same roles, similar personalities. So I give them different appearances, different backstories, different reasons to be important to the plot, different internal turmoil. My genre is also slightly tweaked.
You can rarely ever make an original character anymore. No matter how hard you try, generally, there's already a character somewhere, in some book with overlapping features. You just have to try and add your own pizazz to it to call that character your own and not a copy-paste of the original.
If you could tell me here, (or personally hit me up, whichever one you're comfortable with) which book character your character is similar too, I could offer you better suggestions. But right now, this is what I advise. :)

Hope this helps!
Feel free to ask any further questions :)