I think quitting on impulse is a really common therapy happening. I’d ask for another appointment and explain why you feel you had to leave. I can’t even count how many times I’ve quit therapy during difficult work and then asked to come back.

My therapist always reacted ambivalently when I quit but I suspect she knew I’d always return. You’ve only been in therapy a few months, but I wouldn’t be surprised if your therapist is expecting you to come back too.