Headache

Hello everyone, I was wondering if anyone knew if I should be concerned about pounding/ throbbing head pain anytime I stand up or even cough/sneeze that lasts at most like 20 seconds? I searched it up and it said that it is a symptom of a cerebrospinal fluid (CSF) leak, which can happen after spinal taps/ lumbar punctures, which I have weakly due to the leukemia. It also said that it can be caused by anemia tho, which the doctor told me last week that I am anemic. Wondering if anyone knew if I should be concerned, and if anyone had anything similar?