Water retention but cutting calories - help?

Hello community

I’m really noticing a plateau in my progress - primarily that I seem to be really retaining water suddenly (like 5+ pounds). I noticed this in conjunction with increasing my running intensity (training for speed + distance) so not sure if my nutrition is off? I feel hungry a lot and struggle to keep from snacking all day to stay in a slight deficit.
Has anyone else experienced this? Definitely feeling disappointed in this result as I feel like I’m doing all the right things.