Low testosterone

My husband and I are trying to conceive our second child we have a six year old son. But my husband is having a hard time maintaining an erection or even getting one at all this is so frustrating as a woman. Especially since I am 29 and he is 27. He has assured me that nothing is wrong with me but still it's frustrating. We went to his pcp on Friday and waiting for results from his lab work. He has all the symptoms of low t . Has any other young couple experienced this and either had low t test come back normal or actually having low results. If it comes back normal how would u ladies feel or do You have any suggestions?