You will have to guess on SOME questions somewhere in the test. Right now, you're being stubborn and spending too much time on questions that are really too hard for you anyway, and then you're forced to guess at the end.
Choose to guess on the too-hard questions, instead, and then you won't be forced to guess on some questions that you might actually be able to answer!
In general, these kinds of timing problems typically take about 4-6 weeks to resolve.
Read these:
https://www.manhattangmat.com/blog/inde ... lly-tests/http://www.manhattangmat.com/blog/index ... -the-gmat/And these for more detailed pacing management:
http://www.manhattangmat.com/blog/index ... -to-do-it/http://www.manhattangmat.com/blog/index ... nt-part-1/