Babies heartbeat scan

Smilie • Hello our first baby girl is on the way on the 22nd November 2015... Please be a sticky baby 👼 ✨BD to all
Ladies need some help here. 
Last AF was 14/2/15 so am 5+3 days pregnant today from LMP and I think I Ovulated roughly between 3/4 of march. I have a early scan next Tuesday, am worried incase it's to early to pick up the heart Beat even though I will be 6+3 days next Tuesday for my scan but if I ovulated between the 3-4 march will tht put me back a few days. 
I got a positive peak day digital ovulation on the 3rd march (Tuesday) 
Got a positive digital clear blue pregnancy stating 2-3 weeks last Thursday??
If that made sence will I still be to early to hear the heart beat if I Ovulated on 3/4th