Recast or invest?

We bought our house and sold our old one earlier this year using a bridge loan which resulted in ~250k in profit. Current home loan is at 550k 6.625% interest. BUT I recently left my high paying job for personal reasons so were down to 1 income and have to take an additional 2k out of savings to pay our bills. Our total investments right now include 270k in HYSA and 150k in my 401k.

Would it be wise to take 150k to recast my mortgage to pay 1k less per month, take that money and invest in stocks, or a combo of both?