Pregnancy after chemical forever feeling

I had a chemical pregnancy in September I’ve been trying since but I haven’t gotten pregnant it’s been 4 months now. I don’t have a lot of sex during my window 😂 I’m a teacher so it gets hard definitely going to try at least 2-3 times now. Anywho how long does it usually take feeling down that it hasn’t happened yet. I’ve been pregnant once before. Any chemical stories?