Trying for 2 almost two years. 37 y/o

Hey community,

My fiancé and I have been trying to get pregnant for almost 2 years with no luck. I am 37 and terrified that I may have waited too long. 😭Ever since we started trying harder my period seems so out of whack. Anyone else experience that? It late and light all the time. Folks told me I should take prenatal vitamins to help? Does that work? Is there anything else should can try outside of trying to follow my walking period? So far fertility tests says things on my end are checking out ok. Any suggestions...Herbs, diets, spells. HELP.