Hi Hermina,
Anything other than straight dry-eye symptoms (extreme burning, occasional stabbing pains, a feeling like you have sawdust in your eyes) should be taken to an opthalmologist or at least your GP immediately.
Other than that...
I cannot tell if my meds would work for you, of course. All i know is that I'm allergic to the preservative in most eye drops & gels so these ones work for me.
There is only your own experimentation. I went through about 10 eye drops till I found what suited me.
A very good ointment available in the UK (and probably the US) but not in India is called VitA-Pos.
You use it mainly at night, as you would Lacrigel.
Both of these leave some kind of residue on the lashes, Lacrigel particularly.
As for the AC...
It does sound like the car AC is affecting you and you must always have some kind of drops to hand otherwise you will increasingly get infections like the one you mention.
Here's what I was advised and it worked for me, though it may sound a little odd...
First, I stuffed my nostrils will vaseline and then added lavendar oil around them. On an eight hour flight I did that three times.
I would do the same for a long car trip with AC, and always, but at all times, have some drops that work for me handy for an emergency.
In the plane, I kept my eyes closed as much as possible. I used the drops frequently. I stayed very alert to when my eyes began to feel hot and dry and used the drops/gels. I didn't wait till it was unbearable.
It's vital you keep your eyes lubricated at all times.
The European name for Eurbi is Hydro-Tears or Hydro-Colom (?!).
If you look up the active ingredients of the following five drops you can check their equivalent in the US.
(These are the five I rotate.)
Lacrigel
Vit-A-Pos
Eubri/Hydro-Tears
Cell-u-Visc
Optive
But if you are not allergic to preservatives your task may be easier.
A note of caution:
If any doctor gives you steroid drops (corticosteroids), it is vital you use them only for the prescribed period and dosage. They will create much relief, so don't be tempted to continue using them. In prolonged use they are dangerous for your eyes.
None of the above are corticosteroids.
All the best to you!