After clean MRI neurologist said I am having subangiograhic cerebral vasospasms. Hx of tia's. Can these increase risk for more tia's, treaments options?

TIAs. There is increased risk for stroke in patients who have had a tia. Given your history of atrial fib & diabetes, there may be consideration to adjust your level of anticoagulation or add an anti-platelet med. If you smoke you should stop immediately. Any sort of Cocaine use would also be a really bad idea!