Sometimes I forget to take folic acid, and in general, I'm not taking any…

Sometimes I forget to take folic acid, and in general, I'm not taking any pills right now. Two pregnancies. Everything is going well for me. The fourth month of pregnancy was very strong. Because of this, I forgot to take them all. I eat what I want to eat. Now I'm worried... By the way, can omega-3 be taken independently? My mother-in-law says that you need to drink omega-3, but I don't want to drink it to vomit.