Breathe.
You're still very early and you've got plenty of time.
Here are some suggestions if you're trying to trim down your PS.
A lot of people try to recap their ECs in one way or another. This is totally unnecessary. If your ECs are in your EC section, leave them there unless they dramatically impacted your motivation to become a physician...
It would be fine to talk about specific times you volunteered/shadowed if they were meaning for you, but talking about your research doing plasmid convections and how it impacted your motivation is not going to add a thing. In fact, it distracts from the root of your statement.
Go through your PS and cut out any paragraphs that do not directly address the following:
-intro
-"why medicine?"
-support for "why medicine?"
-any problems/gaps in education along the way that really should be addressed in PS
-conclusion
Ideally this should all be tied together with some overarching theme... doesn't have to be anything too flashy, just something you can reference in the start/finish. Don't do what I did (I'm not even linking you to it), that was a bit of a 3rd round Hail Mary that paid off.
Other PS advice:
-Don't use the word "fascinating". Probably 80% of statements I reviewed last year used it, very cliched and got to be vomit inducing.
-just use a single line between paragraphs, don't try to indent
-don't use more than 1 space between sentences
-re-read it for any sentences that could be re-worded more efficiently, then have someone else do it. Brevity is key.