Well, if it's going to be for you...
I'd add at least one course of antibiotics that'd cover diarrhea - the immodium stops the runs, but doesn't cure the cause. Azithromycin won't do any good there. And maybe something for nausea/vomiting, since a lot of times they go together. Zofran comes in "oral dissolving tablets." I hear it's good for stopping the vomiting but not so good with the actual nausea. Plus the ODT's are kind of pricey.

Without knowing what's locally available, grab some more "cold" drugs. most colds last 7-10 days, so figure maybe 3-5 days worth of drugs to help with the worst of the symptoms.

Naprosyn is good for most aches and pains. I forget if I saw tylenol/paracetamol on the list, but if not, add that too. Tylenol is good for general "pain," whereas naprosyn (aka naproxyn, aleve) is good for pain due to inflammation (strains, sprains, etc). Plus, if needed, you can alternate the tylenol and naproxyn dosing (tylenol is every 6 hours, naprosyn every 8-12 depending on the dose you have, so you can take both during the same day). Just be careful with the NSAID class of drugs, since there's the risk they make bleeding worse (and why Aspirin is a controlled substance in war zones).

For yourself, the kit as is looks pretty good. Good luck on your NREMT-B test - I was fortunate to only need state-level certs. I hear the NREMTB covers topics that are outside your scope of practice. If you have time, pick the brains of some of the paramedics in your area, if any.