Implantation bleeding?

New to this! I had a 6 month miscarriage in September where I unfortunately I lost my babygirl Mia. My husband and I are trying to conceive again. I never get light periods, however this month I began spotting and had an extremely light period. My periods normally last from 5-7 days and this lasted about 4 max. The period was so light my pads barely had any blood.

Can someone explain implantation process and does anyone think this might be it?? Hoping for the best!!!