Please help paranoia?

ok i have been drug free for 8 months and when i did use i tried light stuff and in last 48 hours after 8 months off i tried some heavier stuff i dont think ive ever had thoughts like these like people around me are conspiring against me all around me never had annything like this before does this "paranoia" go away when im clean? its awful and when i think about it it gets worse and worse please help