Thanks for the reply, Spr1ngrolls! I agree it does seem like I have a lot to lose by switching here. I definitely don't hate the research, it's still cool. But it is sometime hard on me when I know I want to pursue something in a different direction down the road.
On the topic of your BioE lab experience, what made the work there more difficult? As a bioengineering major, would I likely be able to pick this stuff up once starting grad school? (to be honest, I will probably conduct bioengineering/translational research but not do a bioengineering PhD just because I don't want to take all the classes required for the masters in addition to med school classes).