porn while TTC after miscarriage

we have been going through a very hard time just recently had a miscarriage and things have not been the same we have been ttc and sometimes he can not finishing. I just recently found out he has been watching porn. honestly we have watched it together and it's not a huge deal but when he can't finish I just assume I am doing something wrong when all it could be is as simple as he already has. but then again I still feel like maybe it is me :( I don't know how to feel I've never cared about porn until now . I will admit he has been having a incredibly hard time with losing the baby he wanted her so bad even picked out her name. He doesn't know what to do with these emotions and have become extremely impulsive