the sex surge???

Hey ladies, we have been trying to get pregnant for 3 years but just recently had come very proactive. I was on depo right after I had my daughter in 2013 for a short time and then bleed for 10 months and have not had a regular period until 3 months ago. I have been wanting to screw my husband all the time for the last week and a half, and when he's not around I find myself fantasising and touching myself. I just want it all the time. it's the only thing I can think about. I think my best friend is over hearing about it lol. but I'm only 28, could I be going through the need to do it before I can't reproduce any more? have any of you gone through this? I had no sexual appetite other than oh my tracker says I should be ovulating we this week we better do it a little.. to over night I want it 3 4 5 times a day..