Short period = less uterine lining?

Natalie • July 21 💚 Feb ’20 💙 March ‘18 💙 Dec ‘15 💙🧩 4 miscarriages 🌈
Does a short period necessarily mean there's less uterine lining? The length of my cycle is long but within normal range (usually 31-32 days). But I'm not finding a lot of information regarding length of bleeding and fertility. I usually bleed for three days - the third day is just spotting. Do I have enough uterine lining??