What Can I Do At Home To Treat My Male 1year Chihuahua's Urinary Tract Infection His Hind Kidney Area Is Tender And Back Hind Leg Is Is Sore And He Has Little Blister Like Protrusions On Both Tessticles?

He is tender in hind-area , licking his penis and testicles appear to have symmetrical blister like forms . He is very sensitive and a little abdominal infamation. I have no finances for vet bills There has to be something for this. He is also walking gingerly. A little discharge from penis yellow pus. Urinary and repro problems. What antibiotic can I give him and how much. Will cranberry juice help. PLEASE help my little man . He weighs 7 lbs. He's a chihuahua and l cant have him suffer like this . I know it is advice I need . HELP.