I need some help

Hello ladies, I've been ttc for about 15 months now with no results. I've done ovulation test, tried to keep note of cm, intercourse every other day during fertile window etc. With no luck thus far. So my question would be: is there anything that is possible to do..
P.s my husband and I have started going to the dr. For testing. With results coming out normal. Except his the lower end of normal but "still normal" as the dr put it..