22 & struggling to conceive

Hi ladies! I’m 22 and have had a child who will be 5 in June. I’m ready to give him a sibling with where I’m at in my life. I’ve been trying to conceive for the last 6 months with no luck. My GYN had me take ovulation tests this month. I am ovulating really late it seems in my cycle as the test in the middle was my day 21 of my predicted cycle. It seems like the test got as dark for one day but then dropped off again. Is this abnormal and something I should be concerned of? Thank y’all in advance!