Need help with my due date

Erika • Mum of 5, 3 pregnancy losses Claude 17/05/21 Ts21, Charlotte 17/03/22, Carly 09/10/23 IG: @onerebelofatime aka Erika Burdeniukaite

So ladies, I miscarried on 24/12 and now I might be pregnant again. Had two positive pregnancy tests telling me I'm 3+ weeks pregnant. I didn't have my period between my miscarriage and now so I find it difficult to figure out my due date. I only can say that I had sore breasts and cramping between 11th and 13th of January which could have meant that an implantation was taking place around that time. Anyone has any reflections on the above?