Dee i was exactly the same, i was like you in first tri i couldnt get enough, second i was interested, i tried but i just couldnt get there lol (tmi), and towards the end of the third it all came back. I am no help as to what you can do as we tried different ways to get me in the mood but didnt work, only thing that workes was time, i think our hormones are just going crazy at that stage we dont know what we want.

Soory i havent been much help but i just wanted you to know it is normal. Good luck with the rest or your pregnancy.