Painful sex

Georgia • I`m 18 and a married military wife! 03-10-15 💕
For as long as me and my husband have been together, the sex has been painful... We use lube and we have foreplay so it's not as if I'm not turned on or dry, but as he's putting it in, it burns and really hurts... It feels good after its in and he gets going but it's so painful while he's putting it in.. 
Any suggestions?