Sex not a sex story

So just wondering if anyone else goes throw this. I been married for 9 years when we first got together we would have sex multiple times a week. Than slowed down to once every two weeks. Got to where it may be once a month to once every couple of months. Got pregnant after having our child and the six weeks where up at sex maybe three times. It was a year and so many months before he even had sex with me. Now it’s been a few months since the last time. It just doesn’t seem normal to me. I’m not the type that wants it every day or every other I’m okay with once every two weeks or what ever. Is it wrong for me to feel some type of way. I feel like just come out with it and asking who he’s having sex with. I keep telling myself that he’s not and it’s just the way I look that he doesn’t want to. Am I over reacting? I mean we haven kissed in over a year not a I love you. Is my marriage falling apart? Just so much that goes throw my head.