Hello ma am and welcome. You mentioned a blood stain, was this after wiping your genital region or the anal region? It is important to know because this will determine the abnormality. As for the bloated stomach and growling this could purely be from a hormonal change or sometimes can even happen after sexual contact. The gas also is a sign of a hormone change so please be more elaborate about any history, medications, stress levels, birth control or contraceptives, etc. Please visit a doctor or write back to me with more information on the same, as there is insufficient amount of information to guide you in a precise way forward. Hope you understand. Best wishes.