I've had mild headaches for the past week plus very little nausea sometimes + low bp(90/60). i've hit my head 2 months ago(mild injury)?correlation?

R/O CONCUSSION : HEAD TRAUMA from a fall, sports or MVA CAN result to in a concussion. Initial head CT may be negative. Follow up with your doctor and a neurologist. I usually recommend monthly visits for 3-4 months to evaluate for POST-CONCUSSIVE SYNDROME. If symptoms persist or worsen, a brain MRI AND MRA may be necessary. Best to rest avoid overstimulation and monitor response. Low bp ca cause HA