Mazal tov on the birth of your baby!
Staining such as you describe is fairly common postpartum, especially when there are changes to the nursing schedule.
It is preferable to
refrain from relations within a day of staining, in order to avoid questions such as those you raise. Strictly speaking, however, having relations when a woman has staining that does not make her
niddah is permitted.
You may use your judgment to determine whether the staining is tapering off to the extent that you feel confident having relations. You should take the following precautions:
- use colored sheets
- if you plan to clean yourselves off afterwards, wait at least fifteen seconds after separating and use tissues or colored cloths
- avoid looking
These precautions are outlined in more detail
here.
As you suggest, you can also shower right afterwards, without looking.
Please write back with any further questions.