I've read these comments and I'm scared to take my vitamin D 50,000 IU once a week. I haven't taken it yet but I've been having chest discomfort and fluttering in my chest as well as being tired all the time angry and I get head aches all threw put the day and my body aches all day it's so stressful going threw this I am 25 with 4 kids and I feel bad because I'm not active like I use to be and everything. So I'm wondering if I should try taking this 50,000 maybe it'll help me but I'm scared it'll make me feel way worse than I've been feeling.