I was under toe last week and the blige kept filling up with water. Any answers?
Okay, face palm on my part.

I didn't think you were under tow
in the water, but being towed on a trailer by a truck. Why I thought that, I don't know.
If you were under tow by a power boat, you were indeed going faster than hull speed. Your stern settled back farther than normal. Water came in through the transom and into your bilge through the bilge pump. Either the bilge pump did not engage, or it did and you did not hear it. Even if the bilge pump engaged, it would not turn on until the float triggers it. The bilge pump turns off when the float drops again with the water level, but there is always a little bit left below that.
How do I know this? Several years ago I was towed back into port by Vessel Assist. All this happened with my boat. I had to radio the skipper of the tow boat to slow down a bit, just enough so the stern was no longer settled so low in the water.