Little dog needing big help!

February 14th 2018, the day I now remember as one of the worst days of our lives. Reagan Alexander Poist is one of the most fearless and rambunctious little dacshuands there was. Anyone who knows her would say that she was a bright light on a dark day. She was that plus a whole lot more for me. Essentially SHE saved my life, she showed me love when I had none for myself. Now it's my turn to attempt everything I can to save her life. The night of the 14th was just a regular night for Reagan. Some cuddling with her uncle Jon and aunt Amanda then back up to our room for bed. As Reagan was walking up the steps (which steps are not her strong suit) to return to the bedroom she happened to miss a step causing her to tumble all the way from the top to the bottom. This was a big fall for a little girl. She suffered serious head trauma (causing her to have sezuires), soft tissue damage in both her hind leg and her neck, possible ruptured disk, neurological issues (which have subdued  slightly after she received medicine to reduce the swelling in her brain) and a bit lip caused by the seizure. We have done as much testing and diagnostics as we could. She's had two X-rays taken to check for any broken bones or fractures in her spine and neck. She was hospitalized for 12 hours in oxygen to help her breathing which was very labored after the accident. She's had blood work and fluids to cover all the basis we could. After all the testing, once she was stable, the doctors felt it was okay for her to go home with a strict plan of no exercise activity (only outside to potty, then back on her bed), anti inflammatories and lots of pain medicine. Unfortunately, it doesn't stop there. Late last night, February 19th, Reagan was rushed back to the emergency vet because she was regressing and starting to go into seizures again. The doctors once again stabilized her and sent her home with the same plan, only this time, if she doesn't make progress we will have to choose between 2 options. Option 1: We will need to get an MRI to find out if there is anything internally going on that we are missing. The MRI can go 1 of 2 ways. Either nothing is going on internally or it is and she will need surgery. So on top of the MRI (which will cost close to $2,000.00) it's possible that she will need surgery after receiving results from the MRI (which I'm told from the vets can be any where from $2-3,000.00).  That doesn't even include the $1,500.00 already spent for the treatment she's received in order to keep her here with us. Option 2: won't be discussed because I won't allow myself to think of that option until I have tried everything I possibly can to save her life. 
With help from Reagan's grandmom we have been able to do the most we could for her at this point. This is where you (the hidden hero's) come in, even if it's a little or a lot, anything donated will make a difference. 1 dollar could be 1 pain pill. ANYTHING helps. I am not too proud to ask for help because this isn't about me it's about Reagan, the 3 year old weenie who stole my heart before I could even hold her. Seeing her in pain like this rips my heart out, which is why I am begging for help. I am doing everything I can to allow my little girl the chance to run through fields and chase squirrels again but I need some help. So here I am asking for any help that I can get so my little girl can live happily again.