I need some advice PLEASE!

Emily • Truck drivers Wife and Charge Nurse,mother to three amazing kids! Loving every second of this crazy awful beautiful life 💕
Last night hubby an I bd and when I went to the bathroom an wiped I had a brown discharge. I'm 7 days late cycle day 39 an 20 dpo......according to glow. Could this be implantation bleeding? Have had some cramping an back aches, tired an moody as all hell!!! Just need some advice plz!