So I have a party to attend tonight and we

So I have a party to attend tonight and we were going to drink some alcohol. Today I went to the Dr and was told I have what appears to be the start of a UTI I picked up my prescription tonight and have not started it yet because I know you can't drink while taking the antibiotic. My question is will it make it worse if I drink tonight and start the antibiotic in the morning instead of tonight?