Fat Malabsorption and Vitamin D Deficiency

Approximately 2 months ago, I noticed that there was white globs in my stool. It looked exactly like fat to me so I assume it is probably fat. I've noticed it in my stools quite often over the past two months. In this same amount of time, I have started to experience extreme fatigue. I am a 41 year old female.

About 6 weeks ago, I had some type of severe R sided abdominal pain that lasted approximately 2 1/2 days. I went to a local clinic. The physician there poked around, and found a tender region around the gall bladder area (per the M.D.) She ordered an abdominal US which was normal. The severe pain went away, and I now only feel pangs and occasional jabs of pain or weird sensations in the R abdominal area. I next paid a visit to my ob-gyn last week for my annual check up and told her about the problems I was having.

She did bloodwork, and it came back that my Vitamin D level was low. I do not have the test results in hand yet so I don't know the exact numbers. The nurse called and recommended taking 3000IUs of Vitamin D3. I asked about my cholesterol which was only 159. I thought this was kind of unusual because I've gained weight since I had it checked 3 years ago plus I haven't been watching what I eat at all. I'm approximately 30 lbs overweight.

The last time I had it checked, I believe it was closer to 200. Based on my symptoms, it appears I'm having some type of fat absorption problem. Whatever is going on has definitely presented a myriad of related symptoms over the past 2 months. Is there anything I should be looking out for or asking a GI doctor about when I go in for a visit? Also, are there some specific tests I should ask for whether bloodwork, imaging or scope?