My vitamin d level was 22, I'm currently taking 2800 ui... Should I be taking more, I weigh 365 and don't work inside house a lot.

Where do you live? 100iu/25# body wt is the rule of thumb formula i usually use so that is ~14, 000iu/day but since you are so low i would just say 20, 000/day and recheck it in about 3-4 months want a level>50 and <100 look uo vitamindcouncil.Org for lots of good informantion/ what sun you get is not getting much vitd for you.