My milk is low

Hi

I have a problem with the my milk supply and I can't determine the cause 😭

My baby is 10 months old.Our schedule is as follows:

Last feeding session 6 a.m. then I go work

I pump at 7 /10/1 at 3 i go back home

4 o'clock breastfeeding

Then 8 and then every three hours she wake up to breastfeed, but the milk is very low

I noticed:

little urine, crying without tears,

I don't know what affects my milk to this degree.

All pumping sessions during work I got 100 ml !!!

Any idea you have to help me figure out why my milk is low and how to solve the problem.