DDS discount store Discriminate me for being a diabetic San Diego California

I am diabetic. By federal law, I am allowed to carry diabetic supplies including a small soda or water. Since my blood sugar was low, I brought in a very small can of soda. Immediately, the security guard told me no beverages. He said he didn't care if I was diabetic. I went in the store anyway. I was confronted by store manager named Juan. He just started yelling with out me explaining things to him. He told me to get rid of the soda. I tried to explain my health reason. He said I was lying. I showed my medical alert bracelet. He started to profile me because of the neighborhood I lived in. I said he was being rude and unfair. He said he was going to call 911. I said OK because the police and EMS know I have diabetes. He huffed. Said I could shop but took my soda away. I shopped and texted my friend to meet me. I met her at a Subway where she told me I was sweating and shaking. I drank an entire 16 oz soda and felt better. I offered an explanation for my soda and was treated poorly.