I'm drained and I'm getting depressed!!

Me and my husband have been trying for a bay for almost 3 years. It hasn't happened. There was a few times were it bought it happened it it tuned out not to be 😑. This is starting to drain me I'm getting depressed now trying. I feel like it's draining me and me and my husband has a great relationship but sometimes I feel like I only have sex to get pregnant lime that's the only reason ill do it!! I feel like I'm obsessed with getting pregnant and having a beautiful baby so my family can be complete, but I also think it's becoming a problem now . Every month I cry when aunt flow comes it's depressing I just don't know what to do and by the way don't JUDGE!!! I know I'm not the only woman out there going through this 😥