Should I give my child herbal medicine?

Hello. Since having and raising a child, there have been so many visits to the hospital...

Before going to daycare, my child had never been sick, but there, they caught various illnesses...ㅜ

Since contracting COVID-19, my child's immune system has weakened significantly.

My child keeps catching colds at daycare, and I think they've been on medication for almost five months now.

One day, I noticed a white inflammation inside my mouth, and as the area gradually grew, I started to worry that I might not be able to take in enough nutrients.

As a mother, my heart is so painfully aching...

I visited a Korean medicine clinic once because my body was weakened from postpartum recovery.

I went to a well-known oriental medicine clinic and paid a lot for the medicine... but it turned out to be a lot of blood during the period. I was so scared that I stopped the medication after two weeks and never visited the clinic again.

And after having and raising the child... since the child's immunity has dropped a lot, I kept hearing from those around me to visit a Korean medicine clinic, but I was scared and couldn't go easily.

So, my first question is

Is it okay to give herbal medicine to a 3-year-old child now?

I'm worried that the child might experience side effects like me for no reason.

The second question is

Is it okay to give acupuncture to boost the child's immunity or to help them grow taller?

We would appreciate it if you could share your valuable experiences.