Fluishness

The day after I'd finished the screenplay, I felt fluish and heavy in the legs. The fluishness and heavy-leggedness increased.

Source: wiktionary

It took her a while, but the more she thought about it, the more she realised that the symptoms she felt – the awful flu-ishness, the persistent dull headache and the heavy aching in her breasts – weren't heroin-related. She was pregnant.

Source: wiktionary

There isn't much I can do about the sensations of dizziness, weakness, or even a little fluishness that occur after a long day without my meds.

Source: wiktionary