Every single thing in existence, including your own body, is composed entirely of chemicals. Water is made of chemicals. Oxygen is a chemical. Every single thing you’ve ever touched, eaten, worn or seen contains numerous chemicals.
It is not normal or rational to be scared of ‘chemicals’. Some chemicals are harmful in certain doses or to certain organisms. Some aren’t. Many things are toxic or carcinogenic in certain doses, but are completely harmless in the quantities in which we use or consume them.
For example, certain fruits contain cyanide. It is still perfectly safe to eat them. Brazil nuts contain a radioactive chemical. They’re fine to eat as well. Lots of perfectly healthy and natural foodstuffs which are great for humans are massively harmful to some other animals. Milk, for example (any milk - this would include human breast milk) is incredibly polluting if it gets into rivers and streams. It can wipe out practically every living thing in the water. But it’s perfectly fine for mammals to drink.
Many of the substances we need to survive would be toxic if you consumed enough of them - but you won’t ever consume enough of them. Zinc, iron and potassium are really important chemicals that we need to consume to be healthy. All three of them are dangerous if you consume an insane amount of them, though - which you would never have any reason to do because no product would ever contain enough to harm you.
Basically, just because you’ve read that a chemical can be harmful in certain contexts and to certain creatures in certain doses, that doesn’t mean it is harming you in the way you are exposed to it.
Your anxiety is extreme and fuelled by misinformation (much of that spread by so-called ‘natural’ or ‘clean’ brands making money out of scaring you). It isn’t rational or logical or based on any scientific fact, and it’s making you miserable. You do need to get yourself some help; you don’t deserve to be panicking and crying and guilt-ridden and rushing around in tears looking at the label of your handwash. That is a crappy way to live.