Changing margins for only 1 page destroys format

I have a page that has too many pictures so I change the margin settings

newgeometry{left=3.5cm,right=3.5cm,bottom=0.1cm, top=0.1cm}
% insert image here
resetgeometry

The problem is, when I do that, the text gets split to a different page. Like in the example below (blurred) there is a lot of white space remaining in the page. Latex would automatically put more text there to fill it up but because I used the geometry function it does not work anymore. How can i fix this ?

Basically, how can I have a large image that fit in 1 page using the margin settings and still have latex functioning properly ?

begin{figure}
captionsetup[subfigure]{labelformat=empty}
    setlengthtabcolsep{0pt}
begin{tabularx}{linewidth}{*{20}{>{centeringarraybackslashfootnotesize $}X<{$}}}
x_1 & x_2 & x_3 & x_4 & x_5 & x_6 & x_7 & x_8 & x_9 & x_{10} & x_{11} & x_{12} & x_{13} & x_{14} & x_{15} & x_{16} & x_{17} & x_{18} & x_{19} & x_{20}  [-7ex]
multicolumn{20}{c}{subfloat[Ground Truth]{{includegraphics[width=textwidth]{results/ms.png}}}} 
hat{x_2} & hat{x_3} & hat{x_4} & hat{x_5} & hat{x_6} & hat{x_7} & hat{x_8} & hat{x_9} & hat{x_{10}} & hat{x_{11}} & hat{x_{12}} & hat{x_{13}} & hat{x_{14}} & hat{x_{15}} & hat{x_{16}} & hat{x_{17}} & hat{x_{18}} & hat{x_{19}} & hat{x_{20}} & hat{x_{21}}  [-7ex]
multicolumn{20}{c}{subfloat[Recurrent Neural Network]{{includegraphics[width=textwidth]{results/ms-rnn.png}}}} 
hat{x_2} & hat{x_3} & hat{x_4} & hat{x_5} & hat{x_6} & hat{x_7} & hat{x_8} & hat{x_9} & hat{x_{10}} & hat{x_{11}} & hat{x_{12}} & hat{x_{13}} & hat{x_{14}} & hat{x_{15}} & hat{x_{16}} & hat{x_{17}} & hat{x_{18}} & hat{x_{19}} & hat{x_{20}} & hat{x_{21}}  [-7ex]
multicolumn{20}{c}{subfloat[Variational Recurrent Neural Network]{{includegraphics[width=textwidth]{results/ms-vrnn.png}}}}  [-7ex]
noindentrule{15cm}{0.4pt} 
x_1 & x_2 & x_3 & x_4 & x_5 & x_6 & x_7 & x_8 & x_9 & x_{10} & x_{11} & x_{12} & x_{13} & x_{14} & x_{15} & x_{16} & x_{17} & x_{18} & x_{19} & x_{20}  [-7ex]
multicolumn{20}{c}{subfloat[Ground Truth]{{includegraphics[width=textwidth]{results/mm.png}}}} 
hat{x_2} & hat{x_3} & hat{x_4} & hat{x_5} & hat{x_6} & hat{x_7} & hat{x_8} & hat{x_9} & hat{x_{10}} & hat{x_{11}} & hat{x_{12}} & hat{x_{13}} & hat{x_{14}} & hat{x_{15}} & hat{x_{16}} & hat{x_{17}} & hat{x_{18}} & hat{x_{19}} & hat{x_{20}} & hat{x_{21}}  [-7ex]
multicolumn{20}{c}{subfloat[Recurrent Neural Network]{{includegraphics[width=textwidth]{results/mm-rnn.png}}}} 
hat{x_2} & hat{x_3} & hat{x_4} & hat{x_5} & hat{x_6} & hat{x_7} & hat{x_8} & hat{x_9} & hat{x_{10}} & hat{x_{11}} & hat{x_{12}} & hat{x_{13}} & hat{x_{14}} & hat{x_{15}} & hat{x_{16}} & hat{x_{17}} & hat{x_{18}} & hat{x_{19}} & hat{x_{20}} & hat{x_{21}}  [-7ex]
multicolumn{20}{c}{subfloat[Variational Recurrent Neural Network]{{includegraphics[width=textwidth]{results/mm-vrnn.png}}}}  [-7ex]
noindentrule{15cm}{0.4pt} 
end{tabularx}
caption{}
label{fig:ood-ms}
end{figure}

documentclass[]{article}

usepackage{blindtext,graphicx}
usepackage{geometry}
usepackage{floatpag}

begin{document}
%your approach:
blindtext
newgeometry{left=3.5cm,right=3.5cm,bottom=0.1cm, top=0.1cm}
begin{figure}
  includegraphics[width=textwidth,height=textheight]{example-image}
end{figure}
restoregeometry
blindtext
clearpage

%different approach:
blindtext
begin{figure}[p]
  thisfloatpagestyle{empty}%
  centering
  vbox to textheight{%
    vspace*{1.12textheight}%
    smash{makebox[textwidth]{%
      includegraphics[width=1.1textwidth,height=0.85paperheight]{example-image}
    }}%
    caption{foo bar}
  }%
end{figure}

blindtext

end{document}