I don't sleep much and i think a lot when trying to have sex and i'm always nervous even if i'm not having sex?

Primary care doctor: There are many signs that may suggest depressed mood, such as: feelings of sadness or hopelessness, angry outbursts or irritability, loss of interest in normal activities, sleep disturbances, tiredness or a lack of energy, either weight gain or weight loss due to appetite changes, anxiety or restlessness, slowed thinking, feeling worthless, etc... Seeing one's primary care doctor is a good start.