Allo. Welcome to the New Growers Forum, sorry I haven't picked up on this. Your plant sure is growing strangely. I have a few questions before we proceed, though if that's ok. :smokebuds:
You said you made that mix, but what is in it? I need to know everything to help you out the best I can.
What nutrients if any are you using?
Whats the RH(relative humidity) in your grow area?
Are you exhausting air out of the area and fresh air in at all times?
Do you have air circulating inside the area as well?
What's your water source?
What are you using to test your Ph?
How close are your lights?
How big is your pot?
How often are you watering?
Go through and answer them all, please and thank you.

Something is off.