Hello, new here!

It's been three months since I got my operation and I have been following said schedule (as my surgeon gave)
10 minutes with the 'small', 20cm. (Use 15cm)
50 minutes with the 'big one', 20cm. (Use 15cm)
Although I usually skip the small one and just use the large one for 1 hour twice per day.
Thing is, I still feel kind of tight.
My surgeon only gave me two 'staves' - my question is, do I
need to go even bigger to be satisfied later with the result, or is it just that I am swollen now or something?
I look at what others have said and they say they've got four etc.
Oh! Also, has anyone experienced hip pains when dilating? or after? I've been having pains in my right hip-back area ever since I began dilation. (I am a very careful person, I take things slow) but I still end up in pain.

Sorry for my not so perfect english, I am swedish. ^^;;