Implantation bleed?

Katylee

Well I am so confused! I have been TTC for 14 months. I actually have an appointment in February with a gynaecologist to see what the hold up is. My periods are not regular since coming off the depo injection so I'm not exactly sure when I would have ovulated this month. My last period was the 2.1.2018 lasting 11 days! Today I have had what looks like pink discharge, not much. I am feeling slightly crampy and have done for the last couple of days. There more like twinges than cramps. Do you think this could be an implantation bleed? My breasts are a little bit sore and I have heartburn in the afternoon. I don't feel like this is my month but then after 14 months I'm not sure when it will ever be my month.