Shitty sex after deployment.

So as some of you know if you follow me my husband just got back from a 515 day deployment. Well of course we couldn't wait to hop on each other but only to find out the sex sucks!!! I feel like I'm having sex with a stranger and it's just not even enjoyable. This was our 7th deployment between the both of us and this is the first time it's felt like this... I worry maybe he's not into me anymore?? Any ideas?