Back on glow after 4 years.

Ok so i used Glow in 2015 to help ttc my son. He's 3 years old now. We only tried 2 cycles before a BFP. after he was born i got on the mirena IUD and haven't had a period since. We decided a few months ago we wanted to have another baby (both of our 4th but our 2nd together) i had the IUD removed on March 12 and 2 days later i had what i think was my period. (I was told it spot but it wouldn't be a real bleed) but this was full on period bleeding and cramps and the whole nine yards. (Lol i did NOT miss that being on the mirena)

I will be 37 on the 4/3/19. I started doing OPKs durring my "period" to just start tracking. And i haven't had a positive one yet....my chart keeps changing based on my life and when i first entered my info it said it ovulate today but then it changed to tomorrow and now it says Sunday. Im confused.

I didn't have this issue last time cause I had a regular cycle.

We aren't trying yet cause we don't want a December or January baby so we are just starting the tracking to be prepared for may to start ttc.

I have a secondary question...

How many of you have had twins because of age without a family history on either side?