Angry annoyed feel like I've lost my chance :(

Last week for the first time I had caught my ov test and managed to get a bright positive. Tried to bd with dh and for the past few weeks he's lost his erection. I know it's not his fault but for past 2years we've had sex same position Everytime. So I've suggested tryin a different position and now he won't come near me so after 1yr and 8month of ttc I feel like I've given up physically and mentally now :(