The on-loan Gillingham man linked up with the Rebels in early November on an initial month-long loan which was extended by another month at the beginning of December.
Chambers has been ever-present in the Worthing starting eleven since his debut away at Hungerford Town on 5 November, making 12 appearances thus far and becoming a key member of Adam Hinshelwood’s midfield.
His single strike for the Reds was a remarkable 25-yard free-kick at home against Tonbridge Angels which helped the Reds take all three points in a 3-2 victory.
The Gills, currently battling for safety in League Two, have a recall option as part of the new agreement.
Fellow midfielder Mo Dabre, who’s been on the sidelines since picking up an injury in the home defeat to Ebbsfleet United, has returned to parent club Swindon Town following the end of his loan spell. However, the club are hopeful that the young Italian will return for another spell once he returns to full fitness.