I can use tampons and pads with my sim but I will go to the period tracker and it shows that she is bleeding but if I let her go without a pad or tampon there is no moodlet that shows she is bleeding or that she needs to change her tampon or pad.
I'm trying to understand what you're describing and perhaps your Sim is just on birth control? If so, the hormones are affected in such a way that prevents the cycle regular behavior and bleeding is basically prevented.
I switched to a sim without birth control and she is on day 4 out of 10 of her period but she still doesn't get a moodlet that shows she is bleeding or that she needs to change her tampon or pad.
