Pregnant right ovary cyst

hi all new to this so bare with me i thought i was 6 weeks preg went for a scan today at hospital in uk. could not find heart beat on screen so could be that its earlier or that i have lost the baby,,... i have a 2 yr old and have had 3 miscarriages this year so far including a eptopic pregnancy whist having my scan done ( the empty womb on the screen) they found a cyst thats 3cm big on my right ovary surrounded by fluid.... is this normal will it harm baby if its in there will it burst??? also on my sheet i got sent home with it says... bare with me its a big word......  the endometrium is 12mm at its mid section??????????????????????

 

also the endometrial cavity had a slight bicornuate appearance at its fundal end???????? help me i dont know wot the hell its on about? pregnant lost it eptopic??? what please help!!!! cheers