Hi, Welcome To HCM & Thanks For Asking Your Query Here If you have vaginal discharge which is grey or develops a strong smell especially after sexual intercourse, you could have bacterial vaginosis (BV) , BV is an imbalance in the normal bacteria found in your vagina. It doesn t usually cause itching or irritation. Like thrush, BV is very common and isn t sexually transmitted. It s easily treated with antibiotics however it won t cause any problem in being pregnant but require medical treatment so finally i would strongly suggest you to see Your OB/GYN for further evaluation of condition and for consulting for difficulty in being conceived I hope it help Thanks & Get well Soon