Hi Olufunsho,
I understand that you might feel anxious rn. But, I think you should not be worrying that much about not getting a quick reply, especially for a thank you email.
The interviewer may receive many emails coming from applicants and simply forgot to get back to you. Or maybe he didn't feel your email require an immediate response. There are many possible explanations for that, and I think no one here knows the answer.
However, if you want to get a response from him (I prefer not to mention a name), maybe you can ask some specific questions that you are genuinely curious about.
I remember sending a thank you note and asking some questions regarding scholarship opportunity and possibility of getting an earlier decision. I got a reply from him soon after. He was very helpful to me.
Oh, and as a side note, I didn't think my interview went well as there were some technical issues at my end. Still, I got in with some scholarship. I hope it helps you get more relax. Good luck!
Posted from my mobile device