Guys I need help

I had a very high libido since the beginning of my marriage recently I had my 2nd iui failed and I don’t know what has happened to me I don’t feel like having sex .i don’t feel that urge that arousal that I used to had . Just yesterday during our intense moment I saw my husband yawn I literally lost all my desires I stopped him and asked if we could continue it tmr he agreed now he’s all excited for the night and here I am feeling like I’ll disappoint him tonight aswell