Had my teeth cleaned after braces, now have small gaps?

[123A]

So I recently got my braces off after three years.
The week after, I went to see the hygienist who cleaned them thoroughly and polished them.
I now have a couple of gaps in between my front bottom teeth.

Questions are:
Will the gaps close up again after a while, as I am assuming they were previously filled up with plaque/tartar/cavities?
Because one of the smaller gaps already seems to be closing

The other gap is fairly big, so can I get some bonding done to close this gap? this gap is in between my two middle lower front teeth

Thanks everyone!