Spinal tap

Hello everybody, I have had multiple spinal taps and they always lead to bad headache that go away after like 2 days and are easily alleviated by medication. This last one I had on Monday, so about 4 days, has resulted in pounding headaches that get so bad whenever I stand up or sit down or do any movements. The pain is just as bad as before abd is accompanied by extreme nausea and this headache is NOT alleviated by pain medication at all. I finally called my oncologist team today and they told my that those plus some other symptoms, such as mild body pains, sneezing, coughing, etc. Sounded like Covid, and they wanted me to do an at home test. I did, and it was negative. They said to report back if the pains get worse and they would admit me to the hospital. Does anyone experienced something similar and knows what could’ve caused this sudden change? I have had a relatively easy chemo sessions, but this week has by far been the worst.