Experiencing mild pain during intercourse after your fertility medications (like Susten progesterone) and trigger injection is relatively common and generally does not reduce your chances of conception or harm a potential pregnancy. These medications and the injection stimulate your ovaries and alter hormone levels, which can temporarily cause pelvic tenderness, bloating, or vaginal dryness, leading to discomfort. Please rest assured that this pain itself won't affect fertilization. However, if the pain is severe, persistent, or accompanied by heavy bloating, nausea, or fever, please contact your doctor right away to ensure your safety and comfort.