Is it possible to over think getting pregnant???

I'm 22 years old my husband is 20. We have been married for almost a year, but when I was 21 he was 19 We got pregnant ( not planned but still happy) We lost our baby at 2 months😢😥 ever since then we have been ttc and nothing. I think the stress of not getting pregnant and having dreams of the horrible bad we lost our baby has really got to me. Can anyone help me with this?? It would be greatly appreciated!!!