Ay alam ko yan momsh, super uncomfortable talaga! Honestly that perineum pain is pretty common towards the end of pregnancy kasi ang bola ng baby ay tumutulong na magstretch na yung area, pero since it's making it hard for you to walk, I'd really suggest checking with your OB just to make sure everything's okay, one of my mum friends had something similar and the doctor just gave her some stretches and tips na tumulong ng malaki. In the meantime, try wearing supportive underwear or a maternity belt kaya at least may kaunting relief, and don't hesitate to rest when you need to. Laging better safe than sorry with these things, lalo na malapit na mag-deliver! You got this, mama.