Possible IB?

Is it possible to get implantation bleeding at 11 dpo? I had 2 tiny pink spots when I wiped once last night and tonight I just had a few more light spots but only when I wipe. I’ve never had any blood other than my period and this is definitely not my period. Period due in 4 days. Have been so tired the last 2 days and nausea. Slight cramping since yesterday. Not painful, just noticeable. Headache all day today. Does this sound promising? This was our last month to try on our own before switching REs and we used preseed. 3 years trying.