I dont know if i stutter

I dont know if i stutter Im not sure if its considered as stuttering or not, when i speak, many times i feel blocks and that i wont be able to pronounce that word correctly, i just say uhmms and ehhs, and after a few seconds the word comes out, or if i want to say the word without saying uhmms and all that, it comes out unclear as i’d miss a few syllables, i asked my dad about it, he told me that its not stuttering and forget about it and try to always speak slowly and allat, can you please help me, cause im trying to improve my speech, but i need to know is its considered as stuttering or not