I feel your anxiety @June1952 (Having had a heart scare last year myself - I was sure I was having a heart attack.) I can fully understand your reluctance for the 2nd jab ... and yes, those who've had AZ first, CAN have the Pfizer for the 2nd - and I actually believe it gives better 'cover' too. I just don't think Pfizer is as readily available in regional areas as it may be in the cities. So maybe a trip to the closest city that has a drive in/walk in Jab Centre would be in order. The important thing is to just get the 2nd one done, for full cover. Not sure of the 'wait time' for the 2nd one, if Pfizer tho - it may not need to be the 3 months that it is for AZ. Good luck xx