I know the feeling. The fact that I can almost perfectly predict how my body is going to react to a miscarriage SUCKS! No one should ever have to go through this even once, but certainly not enough times to recognize a pattern.
With that said.....one of my six I was COMPLETELY screwy afterwards. All of mine have been between 4w1d and 5w2d. One of them my next AF didn't show up for nearly 2 months and then the very next one was like 18 days later and the next was like 40 some days. It took three wacky cycles to get straightened out that time.
I hope things straighten out soon and that you don't ever have to recognize a pattern again.