Anything can increase anxiety/depression depending on the person . . .even though you are not one to run to the doctor, my first recommendation is that you book an appointment for a physical and, before the physical, make a chronological list of when and how your symptoms appeared and any interventions to help the doctor have an overall understanding of how you perceive your health . . . .
As far as I know, and I am not a med professional, fibroymyalgia is diagnosed by a process of elimination of any other causes so you do need professional intervention . . .sucking it up is an option but I am not sure how that will give you a definitive answer . . . if the cause is not physical, then you know that it is psychological . . .and, for that reason among others, I strongly recommend that you do not look on the web . . .for folks like us with anxiety, it is very easy to acquire the symptoms that we read about . . . . so, you need to make the list, ensure that the doctor knows the severity of each symptom and the frequency and, if possible, the context . . . for example, your IBS is worse when you are under stress at work but it is fine otherwise, etc. whatever the case may be for you . . .
If you are not already doing this, then perhaps you need a referral to a therapist to help guide you to develop strategies for managing stress and/or anxiety . . . .
Because fibromyalgia, either caused by anxiety or physical issues, can be frustrating and tiring, etc., this could potentially intensify depression and/'or anxiety . . .but only medical professionals could help diagnose and work with you on a "best" course of action for you . . . whenever you can, let us know how things are going for you, okay? Take care, kc