Vitamin D deficiency Hello! Let’s get into it- after a very extensive round of labs it was discovered that I am severely vitamin D deficient; my level is currently sitting at 6.4ng/mL. I have been prescribed 50,000 IU of ergocalciferol in capsule form. I am just curious if 1) this is a safe dosage, 2) this will be effective in bringing my levels up, 3) there are any side effects I need to be concerned about? Background info below:

26 years old
Female
134 pounds
Caucasian 
Ulcerative Colitis &amp; Asthma 

Medications: 300mg vedolizumab infusions every 8 weeks, 1,000mg mesalamine suppositories, birth control, Zyrtec for seasonal allergies

This all came about because I have been experiencing heavy fatigue and brain fog (heavy, slow cognitive feeling, unsteady balance, mental tiredness) So we are hoping bringing up my vitamin D will help alleviate these symptoms. Will this medication interfere with my Colitis?