Confused!

So I miscarried earlier this year and had to get a D&C in early June. My periods have been on time and normal since then but last month, a week before my period, I started to spot for a week or more straight in a row. Normally I’ll spot for a day or two before my period but this month and last month this has happened. Me and my fiancé are trying to conceive again, so I’m not sure if this is normal or if I should maybe tell my doctor about it.