2 days post, nose looks horrific - Could this just be swelling still? Or is there too much filler in my nose?

I would recommend that it would be prudent to contact
your treatment provider and to ask them to conduct a face to face assessment,
as there is potential that there could be an infection, which should be treated
immediately. As you mentioned yourself, your swelling could be down to a number
of factors, but I would suggest, as you are concerned your provider would be in
the best place to make this assessment.

It's very likely that it's swelling but I would contact your injector to let them know about your concerns, and for them to rule out complications. The swelling you experience after treatment can greatly vary between visits, even if the same injector is used and places the same exact amount, and type of product. It all depends on your body but I've noticed changes depending on where patients are at in their cycle, recent sun exposure, if they've recently been taking blood thinners or supplements... 
Even though the swelling (which can present unevenly and be cause the tapering), some slight redness, and the soreness are all normal at this point, contact your injector.