TTC help

So I had my Mirena removed Monday.
I started AF today. I am tracking in the app "My days"
It says I would ovulate in 15 days.
How accurate would that be assuming I did nothing else to try to determine my O date

I'm using that too and I've had the spotting like you are now plus one regular period and it said I ovulated almost a full week before I thought I would.

I actually used this site, http://www.webmd.com/baby/healthtool-ovulation-calculator
and im currently 7 weeks pregnant.

not accurate...unless you know how many days you cycle is. I dont understand the need for an app..just mark it on the calenday. the "typical" cycle is 28 days..ovulating around say 14..so thats what those apps will most likely go by..especially if you are just regulating your cycles

When I had my Mirena taken out I got my period 3 days later. We had sex once & then I ended up pregnant. By the size of my baby I ovulated 3 days early than we thought. My doctor said it takes a few cycles for you body to get regular. Good luck!

I would suggest using OPK's to help determine your ovulation. When I was TTC that is what I used and they helped. Good luck!!!