Bumped my head and developed a goose egg. did not lose consciousness, no vomiting, no dizziness, no nausea. felt completely fine afterwards. i have a very light headache. i am a very anxious person (on lexapro). worried i might have a concussion?

Your lack of symptoms are a good thing. Talk to a trusted person who can monitor you over the next 24 hours checking on your consciousness, alertness, and asking after nausea and dizziness. If anything changes, you develop a worse headache, nausea, vomiting, dizziness, blurred vision or fainting, you should be seen in urgent care or ER. Otherwise use Ice on the goose-egg.

Concussion is a closed head injury causing alteration of consciousness, loss of memory, or a combination of both. If you do not fit this definition, then you did not have a concussion. You might consider handling your anxiety via cognitive-behavioral therapy and biofeedback. Meditation is also of value.