We had ours a few weeks ago.
It was meant to be at TECA in Aberdeen - 20 miles away - but managed to rearrange it online at a local surgery 4 miles away. Only problem was i got the clotting one (forget the name, the Oxford one?) and was badly ill (tired/sore and generally spaced) for a few days afterwards.
In fact the first night i got up at 1AM and puked...might have been the bottle of wine i had though as it came out red...!
That seems to line up with how i understand it works. We got ours at the Leth local community treatment centre where i'm sure they would have the refrigeration needed to keep the pfizer product - and that's what we got. My oldest boy, his wife and my younger boy's essential worker wife all got jagged at local surgeries where I would think there was not the required refrigeration on site and they all got the Astra Z. which i think is the one which has the bad press about the clotting.
As i understand it the Pfizer is known for a gentle, or no, reaction to the first jag and then it "hit's you second time round - which is how it got me. The Astra Z, I believe is the other way round with the first one making you poorly and the second much milder. Seems to be what you are experiencing?