I think you are worrying unnecessarily.The more you masturbate or have sex,the less you will ejaculate,it's normal!
When I have sex with my man,we like to do it as many times as we can.The first time is always quite a bit ejaculate,but by the end nothing is even coming out.
And it can take time to build back up again...So that explains why after a month you had your pre *** back again.
And another thing,girls are not interested in how much ejaculate you can squirt.
Sorry but that is only something in porn that people care about.
Trust me,you have nothing to worry about