I have a ton of LORs from physicians so that isn't a problem. I do have some shadowing for about 3 months but nothing too substantial (not sure about how many hours I did I have to go and ask). I do have a research thing that I was going to jump in and I should actually get published. idk if that changes things or not?
If this is just a matter of hours: I remember for the AMCAS, for each EC they ask you when you expect to end -- up to August of the end of the cycle and presumably before you start. For the AACOMAS, I remember they often asked for how many hours you dedicated to each EC. They definitely asked for start dates, but I don't think they asked for end dates. But I personally entered in the number of expected hours dedicated if it was on-going. Perhaps you can do the same. I ended up grossly underestimating some EC hours and grossly overestimating others. Woops.
If it's a matter of experiences, as I had mentioned: It looks bad to list a bunch of experiences that began 3 months or less prior to sending in your primary. It makes applicants seem fickle and/or panicked unless you have several that have been on-going for some time.
But if that isn't the case, which it sounds like it's not, you should just apply. I was under the impression that you were lacking in several significant EC categories, but you've stated otherwise. If you think you're competitive with just the number of experiences and can speak to the skills and characteristics you demonstrated (I would refrain from merely listing responsibilities in the EC section), the number of hours won't have mattered much. As you mentioned, it's always better to apply early rather than significantly later; you don't want to end up on the waitlist when you could have gotten in.
I should mention, from personal experience, few schools give a formal opportunity for you to update them. Some will do it during interview, but this is of most concern when you're waitlisted. You could opt to send your secondaries later, but not every secondary has a space for you to talk about whatever you want.
In terms of LORs: As an applicant, I always thought having a good number of LORs could never hurt. But remember a lot of schools limit their LORs to 3, some to 5, and very few are "unlimited." I would recommend avoiding two LORs in which the writers know you in the same context, as they can seem redundant and wasted. For instance, if you worked at a hospital as a tech, I wouldn't get two LORs from doctors you worked with. Same goes for just shadowing.