Stuttering.. please help?

ive had a bad stutter since i can remember and it has hurt almost every aspect of my life: my self esteem, confidence, social life, school, work, ect. its even worse that im at a school where oral presentations are frequent and i need to answer phones and talk to people at work so that just makes things worse. every time i talk i think about embarring myself and what people will think. people that dont know i stutter just think im dumb and cant read or talk right and im very often bullied for my stuttering problem. i went to speech therapy for a few years but it didnt help at all. im mainly having speech blocks on all of the vowels, s, p, c, and m. im not looking for any expensive product or group therapy, all im looking for is a new simple tips on how to help my stutter. any advice is good for me. thank you