We are trying for our second baby. I came off the depo injection in June and have had one period since (1st of August until the 3rd of August). We have had unprotected sex on the 5th, 9th and 12th of August. I have no idea when I have ovulated or am due to ovulate however today (day 15 of my cycle) I have had some brown spotting as pictured. I’ve also had a headache all day and I never get headaches. My breasts have been tender over the last couple of days and I’ve been so tired I’ve been napping every day for the last three days. Surely it’s too early for it to be implantation bleeding?