Help please

Chantel

So my wife has been spotting brown discharge for about 4 or 5 days now this morning when she used the restroom it was red but stopped again does anyone have an idea of what this could be? We inseminated on the 15&16 and since numbers were high again on the 19 we did to be on the safe side she is now 5 days late for AF and we are honestly lost about it. Any input would greatly be appreciated.