Someone tried to explain this to me once. They said that the original formulas for insulin are really cheap, it’s just the manufacturers have all agreed to only make the expensive formulas to maximize profits since it’s not in their best interest otherwise.
I think that line of reasoning will quickly become a ouroboros situation when you think about the details of cause, effect and desire.
I suppose the best outcome is the one where you’ve destroyed yourself and are replaced with a nearly identical person sans the reason you changed time and the butterfly effect of everything that stemmed from that.
At worst you’ve duplicated yourself and have a wonderful opportunity to observe yourself blissfully unaware of the reason you changed time.
But depending on which flavor of time travel used. I suspect the most likely outcome is you’ll continue doing this again and again. Something always misaligning with your goals potentially unaware that anything has already happened. Never seemingly perfect or that time becomes this window of experience looping, endless eight style.
Maybe check your vitamin levels and make sure you’re drinking enough water. Sugar is dehydrating, a general rule I follow is drinking 2 cups of water for every cup of something else.
My understanding is that they learn how to play as puppies as they would get feedback. So you may consider exaggerating when it hurts to better highlight the pain. Alternatively, another puppy to play with.