I am so worried about the tiniest things and can no longer focus on anything. should i see someone?

Might help.: Exercise and hour a day, eat lots of fruits and vegetables, sleep 8-9h a day. If your symptoms persist see your doctor for medical assistance.

Absolutely!: This is a painful situation, and you need to live your life in the best way possible. I strongly encourage you to find a psychotherapist who can help you figure what is going on and how to move forward. You can ask people you know for recommedations, ask your doctor and/or look online for psychotherapists in your area. Please don't delay. There's no need to suffer alone.

See below: When anxiety/worry causes a person to feel distressed and/or impairs an individual's ability to effectively function in their various life roles (eg student, family member, employee, etc), then there is usually an indication for the individual to discuss their anxiety with a medical and/or mental health provider.

Yes: Need to figure out the cause of your distress & find relief--i'd start with a psychiatrist.

Yes: Frm your description, worrying about tiniest things to the point where it is affecting your concentration...Suggests you definitely will benefit from an evaluation to rule out a treatable disorder. So make an appointment with a mental health professional and get evaluated, good luck and feel better.