Positional pressure headaches

It's been over a month since my lumbar puncture and I am still having headaches but not in the classic sense (those went away weeks ago). These headaches only happen when leaning forward, when really tired, or when straining in any way.. They resolve quickly when position is changed(sometimes when standing straight up, or tilting my head a certain way). Has anyone else dealt with this? I never had headaches really before my LP. Could this be rebound intracranial hypertension? I have an appointment with my neuro in a couple weeks, and will let him know if these headaches persist.