ttc after miscarriage

I had a natural miscarriage 3 weeks ago today 😣. Me and my partner have been trying again but not like before miscarriage.  Today would be my first day of period in a normal cycle but obviously due to miscarriage it's going to be different. I feel exactly how I felt when I got pregnant, minus the sore boobs. I'm super grumpy too today. Could this mean I'm pregnant again or just hormones going abit mad in my body?x