Hi MSBelle. Most PWMS DXed with RRMS, to be eligible for the meds.
Then you wait 6MO to a Year, to see how it progresses. Steady prog-
ression with no pronounced remissions, is usually then DX as PPMS.

SPMS usually happens, when RRMS stops having reg attacks and your
MS slowly progresses, usually reaching a plateau and stays there.
That is where I am now, with LDN, hopefully, keeping me there.