Importance of senior midterm grades?

I’ve never been that great of a student for a multitude of reasons, but last year I decided to work harder and ended up improving my grades for several classes. My math/science grades remained mediocre - I’m stronger in English/social studies/etc. type classes - but my math teacher really liked me and wrote a positive recommendation letter explaining that I worked extremely hard but struggled to show that in tests and quizzes. Anyway, the small improvements I made brought up my GPA by a couple of points and I ended junior year feeling pretty confident about senior year.

To make a long story short, I’m worried the efforts I made during junior year will be completely overshadowed by my senior midterm (first semester) grades. I wrote great essays - my counselor said they were exemplary and said I had very little to edit - and got a decent ACT score, but I struggled a bit with my math/science classes (again…). I haven’t checked my exact scores yet, but my parents told me they want me to work harder next semester, so I’m assuming they’re not as high as I hoped they’d be.

tl;dr - I struggled during freshman/sophomore year but raised my grades and overall GPA in junior year by a couple of points. However, I’m worried my senior midterm grades will negatively affect how colleges see the improvement I made in 11th grade. The only thing giving me hope (?) is the fact that my counselor said my essays + ACT score were great and would probably give me a little boost.

+) I already got into two of safety schools and am waiting for decisions from 8 other schools.

Just don’t fail. As long as you’re not getting a bunch of Cs and Ds, I think you’re fine.

Senior Year first semester is kind of important but basically to check course rigor so as long as your grades don’t drop till the end, you will be fine.