The sentence you provided is mostly clear but could be improved for grammatical accuracy and fluency. Here's a rephrasing:
"The way I've been multitasking lately has made me more stressed than I have been in a long time."
### Meaning:
The speaker is expressing that their current level of multitasking is unusually high, and as a result, they are experiencing a significant amount of stress, more than they have felt in an extended period.
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