Why so short ??tmi

Erica • I recently had a miscarriage and we are trying to have a baby we have been trying for about 5 months praying and hoping
So I started my period on April 3rd my first one sense my mc in feb I only had it for 3 days really only two I started off with brown spotting then to red blood for about a day and 1/2 now I am back to brown spotting I usualy have my period for 5 days why would it be so short ???