Sorry, it sounds like you are going to die
I am assuming you are using IRAI
There are some built in times that DD will keep looking for you (cant remember how long). You need to get past this period without detection.
If it is a Hunter Killer group, they will stay on you forever.
How to get away.
Can you go deeper yet (180m and still maintain depth at all stop)
Use all stop as DDs pass close over you. (check with external cam)
When there is a gap, use 1/2 knot to 1knot.
As DD comes around again - go all stop and coast.
Dont be tempted to go faster as they will be back on you.
You couls also adjust your realism to show the pacman (orange area where you can be heard at you current noise level)