my traffic dropped when changing themes

Good day,

I’ve seen some strange drops in traffic after changing my website theme.

My Website is: https://www.techtechy.com

What’s strange is that for the past couple of weeks, my traffic would go up for a couple of days then drop again to basically zero for a few days. This would repeat week after week.

Could you kindly advice what’s going on?

I’ve spoken to the person who made my theme and he can’t figure it out either.

Thank you