@gearsstudio What is done, is done. You should try to improve your grades as much as possible before the end of tern so you do not look completely “lazy”.
As for not trying as hard because second semester senior year does not impact admissions, I understand that to a degree but your level looks like you just stopped working. I would say that you should not let this happen again.
You will, hopefully, be in this position at least one more time when you graduate UG. Please do not drop this much in your performance because it will show lack of maturity.
After college, you will never have a chance to be “lazy”. In the working world, you are expected to bring your best effort everyday. Enjoy these momentary lapses now because you will not get them later! :))