Is your cat wailing?
Is she young and female and making a sound like she’s in pain?
Is she rolling around on the ground or rubbing her tummy along the ground with her tail high in the air?
She may well be on heat.
Cats are stimulated to come on heat with increasing daylight hours and they do not have a set time period in between heats, they can come on and off heat quite often.
The best thing to do is have her desexed. this procedure is carried out any day Monday to Friday and is a fairly straight forward day procedure.