My program keeps spamming print function Python

Man, I'm on here a lot tonight.

Ok, so I just finished my assignment. My only problem at this point is when I go to test the "else", it keeps spamming print until I stop it.

Here is the full code.

import re
from statistics import mean


def file_info():

    # Open & read file
    grades_file = open('grades.txt', 'r')
    file_contents = grades_file.read()

    # Print Header & spacer
    print('Name' + '\t\tGrade')
    print('---------------------')

    # Print contents of file
    print(file_contents.rstrip('\n'))

    # Extract numbers from file, calculate avg
    num_list = re.findall(r"[-+]?\d*\.\d+|\d+", file_contents)
    grades = [float(num) for num in num_list]
    average = mean(grades)

    # Print avg
    print('Average Grade:', format(average, '.2f'))

    # Close file
    grades_file.close()


def main():
    file_info()

    # Open file to append
    grades_file = open('grades.txt', 'a')

    # Continue program press y or n
    fwd = str(input('\nAdd another student (Y/N): '))

    while True:

        if fwd.lower() == 'y':
            while True:
                name = str(input("Enter student's name: "))

                if not name.isalpha():
                    print("Please enter a valid name.")
                    continue
                else:
                    break
            while True:
                grade = float(input("Enter student's grade: "))

                if grade < 0:
                    print("Input grade between 0-100.")
                    continue
                elif grade > 100:
                    print("Input grade between 0-100.")
                    continue
                else:
                    break

            # Write data to file
            grades_file.write(name + ' ' + str(grade) + '\n')

            # Continue adding more students?
            cont = str(input('Add another student (Y/N): '))

            if cont.lower() == 'y':
                continue

            elif cont.lower() == 'n':
                grades_file.close()
                file_info()
                exit()

            else:
                print('Choose "Y" or "N"')

        elif fwd.lower() == 'n':
            exit()

        else:
            print('Choose "Y" or "N"')
            continue


main()

If I try to test the last "else" statement, it spams "Choose Y or N" until I stop the program.

The only thing that stops it is if I "break" but then the program stops and doesn't try to ask the user input again. Ideas?

Edit: This is what the output looks like

Choose "Y" or "N"
Choose "Y" or "N"
Choose "Y" or "N"
Choose "Y" or "N"
Choose "Y" or "N"
Choose "Y" or "N"
Choose "Y" or "N"
Choose "Y" or "N"
Choose "Y" or "N"
Choose "Y" or "N"