I've been having constant stomach pain/aches in my lower abdomen for the past 3 months, could it be a part of my depression and anxiety that i have?

Although physical: symptoms can certainly be a part of the experience of anxiety and depression, these symptoms might also signal something else. In addition to telling your psychologist/counselor/psychiatrist about your stomach pain, it might also be helpful to see an internist for a check-up. Make sure to tell him/her about the stomach trouble, anxiety/depression, & and any other physical/emotional difficulties.