hiya,
I've sorta experienced the same as you recently too!
back in the summer whilst I was on holiday I thought I accidentally took 30 units of fast acting novorapid instead of my usual levemir dose! I had one of the worst hypo’s I’ve ever had and it wouldn’t come up for a good hour, which is why I panicked and assumed I had taken the wrong insulin. Ever since then I’ve been terrified of injecting my insulins due to experiencing even more hypo’s after injecting levemir. It’s got to the point where I’m always on edge about my blood sugars and was testing about 15-20 times a day, whilst also massively reducing my doses to keep myself running high. I developed such awful anxiety and panic that I have started taking pictures of every injection I take just to reassure myself that I’ve taken the right one! This only helped for so long as I’ve got to the point where I have at times had to check these pictures around 50 times over the following hours (sounds like OCD ***).
So yes so answer you’re question I can easily relate to the fear of hypo’s with insulin dosages! I'm happy to talk if you ever need to! You’re not alone trust me!