Could I be?!

It's been 3 weeks since my miscarriage. As soon as the discharge stopped I started opks. I got what I thought were almost positives on Tue of last week. I posted a pic of it on here and people said it's positive. I had twinges and ewcm up until Saturday. This morning I woke up with sore boobs, which I had when I first got pregnant. I know it's early for symptoms but with my first pregnancy I had sore boobs at 4dpo. I'm also really hungry, tired and very hot and sweaty. Could I be pregnant again or is it wishful thinking? We dtd Wed,Thur and Saturday x