Hay, 3 weeks postpartum and may pressure pa sa tinahi is something you should check with your OB agad, mama, hindi ako masyadong sure kung normal pa yan o may inflammation na, better safe than sorry with stitches! One of my mum friends had similar experience at turned out she had a small infection, so doctor gave her antibiotics and she was fine within days. In the meantime, try warm sitz baths (sobrang helpful talaga), wear loose underwear, and avoid heavy lifting or strenuous activity muna. Kaya mo yan, mama!