Bootcamp Disappeared (Created third Partition)

Hello,

I've been running Windows 10 on bootcamp for a while now and because I needed more space on my windows partition, I decided to create a third partition which I planned to merge onto my current windows with MiniTool Partition Wizard. The problem I am having now is that I cannot boot into windows anymore as it does not show when I hold ALT during restart. Also, if I select bootcamp as my default startup disk, it never boots into it and tells me to insert the disk and press a key (similar to when you are formatting a PC).

If anyone could assist me, it would be much appreciated. Thank you!