1st Cycle after MC... When?!?

Erin
I suffered at miscarriage on 4/14 at 5 weeks, my midwife told me since I lost the baby so early we could try again right away, and that I may have a longer LH surge and could possibly be "more fertile" she told me to start tracking opk's as soon as I stopped bleeding. 
I bled for 6 days and ended up getting positive opk's the 23rd-26th of April. SO and I had sex the day before my 1st OPK and had sex every day I had a positive OPK... Just going by dates on when I should have ovulated I should have started my period a couple days ago. 
No period yet. My boobs have been sore, but other than that everything seems normal. I'm guessing I'm not pregnant since my tests are very negative, but how long was it before you ladies got your first cycle after miscarrying. I'm now 15 dpo... Is it too early for me to be testing for pregnancy? How many days post ovulation were you when you got your first period after MC?