Emergency Visa Extension

Please help me apply for an extension on my UK visa, so my beloved dog and I have time to recover and find a solution to an emergency that has put us in an awful and terrifying situation! 

I came to the UK with my dog, Finnick, from America on a fiance visa, with intent to marry my partner and switch to a spouse settlement visa.  I have been in the UK for over a year, and have come to consider this my home.  Days before the wedding, and my current visa expiration, a series of tragedies put my partner into a mental health crisis, and he called off the engagement and sought medical help.  As I had spent all my time and money over the past few years relocating my life to the UK, I was suddenly faced with losing it all within days, and no possible clue on what to do next. Moreover, were I to overstay without applying for an extension to at least have time to research my options, I fear I'd be at risk of being caught breaking the law, taken from my beloved Finnick, and sent back to a country I no longer consider my home. 

Although this sudden change of events in my life has been emotionally devastating, I have very little time to clearly find and view my options, which will change my entire future drastically.  I consulted an legal immigration expert who informed me my first step is to apply for an extension of my visa before it expires to avoid overstaying. 

The cost of the application is £1033, with various other additional fees (medical enrollment, biometrics, UK regulation photos, solicitor application review, etc) totalling around £1900. 

Please help us stay together, stop fearing what might happen tomorrow, and give us the chance to find the best possible solution to keep our future safe.  With just days to decide what to do after such shocking life changing event already, we are begging for just some time to approach the situation with rational thought for the best possible outcome of a horrific situation. 

Thank you for any help you can offer us <3