Is it normal to ovulate so fast?

B.
I had a miscarriage on May 15th and bled heavily for about 5-6 days, then spotted until this past Sunday. On Monday, I got a positive ovulation test - does that make sense? And if I only really just stopped bleeding on the Sunday, would my uterine lining be okay to support another pregnancy already? 
I feel dumb asking this, my midwife said I do not need to wait until another period before we start trying again, but I find this timeline so confusing! 
Update: I had gotten a negative pg test a week before and blood test confirmed no more hcg in my system prior to ovulation testing.