Just got arrested for a supposed DWI even though I blew a 0.0000000. Don't cops need to read your Miranda rights to you? I asked for a blood or hair follicle test and I was denied. WTH is happening?

I work at a tobacco shop. And after they said I blown through a stop sign. When asked when drinking I said no. Then he said I smelled, and I quote, "of something suspicious". I get cops get their paycheck for tickets and such but seriously has it really gotten this bad that for a ticket they try to make it something bigger? and ignoring my rights?