Yeah, I agree with
@Jessica Booker. When I went for AZ today, there was a lot more information provided on blood clotting conditions - as a result of everything that has gone on. I think they're unwilling and actively advising against people receiving AZ that are in that category now.
There's an ongoing study at the moment that is looking at whether you can mix vaccines, i.e. AZ is your first and Moderna is your second, and the results from that are expected to be published soon. After this I believe the NHS is looking at offering an alternative for those who are younger or high risk that have already had AZ. Ask your GP, but in your category they might advise you waiting it out!