Loose stool with vomiting and fever. Il!

My 1year old son is having loose stool +vomiting + fever since Friday, he suffered  same condition every month and every time he is  diagnosed with infection in his stool with increased in pus cells 22 march when he first time fell ill doc gave him oflomac,vizylac,emnest syp, his pus cells were 4to6 with acidic reaction of stool on 22 april he again fell ill  doc gave  oflomac,medilac,vomiorg, 25 april doc gave  reflora sachet +cicef injections of 250mg each for 5 days ,on 28 april doc oflomac, maxzith ,vomiorg, medilac,for 5 days and adviced for a liver ultrasound as according to him he has swelling,and pus cells were 4-6 with acidic reaction on 5 may doc give nan lo lac for milk, hysin, maxzith and wycoff for 5 days on 30 may again he fell ill doc give namcod ,ondem,trixomo ,graculac enterogermania ,+cicef 500mg injection for 5 days,and advised for CBC where his blood was7, on 1 july he again fell il we opt for homeopathy on 22 he again fell every time he recovered but again fell il