I have question concerning the zikhr in namaz.

I noticed that before, I made many mistakes in the makhraj in namaz.
So, I learned the correctly pronounciation of it.

But, I still have difficulties to memorise it.
So, during my namaz, I repeat 3-4 times the same part of sentence to make the correct makhraj.

My namaz is still valid right? Even if I repeat more than 2 times the same word to pronounce it correctly?

Yes no problem