Doctor prescribed 50,000 IU once a week, but left choice to me to take 3,000 a day instead...

What do you think? Is it better to take the large quantity of 50,000 IU's of D at once? Once a week for 8 weeks she said. She left the choice to me only after I questioned it. I suggested I do what was prescribed to me in the past by another doctor which was 3,000 IU's a day.

I am vitamin d deficient, after a recent test, which I was not surprised bc I have been in the past. I have currently been experiencing major body aches/pains since last night and am wondering if this is why...or could it be some sort of flu, as I didn't get a flu shot and I work at an elementary school. I've been searching around on the internet googling stuff about my symptoms.