ok was on methadone started using fent daily so took the opritunity to get on sub i didnt do a shot for 24hrs but was afraid of precip wd so took 2mg then 2mg and stoped cuz hubby took 8 and went into precp wd so we stuc it out i didnt get sick but didnt feel good ne ways went back the next day n got 8mg.... its been 2 days on 8 mg and i feel nautious and my back is killing me what is going on? will it get better ? what di i do i feel like ????! i ust want to feel ok again help!!!