I've been feeling more tired and have some bloating. When should I see the doctor?

See your "PCP" While your symptoms do not sound worrisome, there probably is a good explanation for this; there is no one better to get to the bottom of this than your primary care physician. We are at our best professionally when we have established long-term relationships with our patients and can intervene very early in the course of one's illness. Ultimately, our goals are the same: to get you feeling better.
Now. Any time now. This could be many things. From simple to very complex. Need at least blood work.