i suffered a concussion by hitting my head in the back left part in Febuary. a CT scan was negative but a couple months later i did drugs(cocaine) and drank and since then i have a sharp pinching headache that comes and goes during the day and i didnt have it until my late night bender where i hit my head originally. could it be a aneurysm poking out or maybe just my concussion acting up. im hoping its only a headache

also what are the tell tale signs in your vision you may have an aneurysm?