Thank you for getting in touch with us. As I see, you had a long period this time around. We would like you to know that some females sometimes have periods where there is less bleeding and they are longer than usual. If this was a one off and hasn't happened in the past, then you need not worry. The chances of you being pregnant are not very high thought you can still repeat the pregnancy
test again to confirm. If you still feel worried about it, you can consult your Ob-Gyn Doctor and he/she can guide you better.
Hope this helps.
Dr. Gagandeep Dhillon