Ten days of finasteride is a very short exposure and the drug clears from the body within days, so what you are noticing now is far more likely a temporary hormonal and anxiety-driven fluctuation than lasting damage. Semen volume normally varies with hydration, gap between ejaculations and stress, and a higher volume by itself is not a disease. What matters is whether you have any pain, burning, blood or fever - none of which you mention. In practice most men in your situation settle back to baseline within a few weeks once they stop monitoring themselves daily.
Next Steps
Do not restart finasteride. Give it 4 to 6 weeks, sleep well, cut alcohol and stop checking yourself every day. If symptoms persist beyond that, a
testosterone,
prolactin,
thyroid profile and a urine test will clarify things quickly. Book a consult with me on Practo and we will go through the reports together.