Uk mums pregnant with twins??

Abnormality • Blunt black Brit single mum to 1 beautiful teen & B/G twins👩🏽‍🦱👶🏾👧🏾

Yesterday I had to go into hospital with severe migraines and temporary loss of sight, whilst there I was sent to MAC but they didn’t check my twins apparently because I’m having twins they don’t check their heartbeat because there’s more than one and it can be difficult and they didn’t do an ultrasound because the techs were busy in delivery suite. I’ve a 20 week anatomy scan next week I’ll be 18+6 then but when will I get the chance to listen to my babies heartbeats or won’t I??