What Causes Pain And Numbness In The Neck While On Valium?

hi im a male 42 year old ex herion addict have been cleen for over seven years dont smoke or drink and doing all i can to get healthy.....in the last year of my heroin addiction i was injecting in my left external jugular vien....i can feel a lump in it....i suspect it has a clot in it.....it looks as though i have no jugular where you used to be able to see it clearly....i get pain and numbness down past the front of my ear and down my neck.....no doctor will listen to me...all they have done is put a stethoscope to my neck and say i might have stenosis but dobt its a clot....they say the lump may be fiberous tissue at old injection site....other doctors say i may have no jugular but i will be ok as i will have enough collateral veins......i am worried it is going to cause me problems as i age or the clot will end up in my lung and kill me.....what tests should be done what treatments can be done...can you survive without an external jugular.......im a surviver of childhood sexual abuse and neglect was homeless at 15....i was self medicating and self destructing for many years and didnt care if i died....now im doing so well and want to live but i still just get treated like a drug addict....i walk up to 20km a day...eat an extreamly good diet...im getting quite healthy....just worried about my jugular.....i have a slightly enlarged septum in my heart...im on 300mg irbesarten my bloodpressure is now stable been told i may be able to reduce irbesarten in future and im on 8mg suboxone....used to be on 120mg methadone...i smoked for over 27 years no ciggs for 13 months no alcohol for 15 months no benzos for 17 months except for inpatient withdrawl unit swap from high dose methadone to suboxone i used valium for a few nights............it taken a long time to get better....please what should be done.................................didnt realize this would cost......oh well......i will see another doctor in person........thankyou anyway