This has been mentioned a lot on various threads, @ProfMakris has tweeted an interesting view on VITT cases after the 2nd dose AZ vaccine which may reassure some of the people worried about the second dose!
threadreaderapp.com/thread/1396139927537176576.html
I am in the same boat and feel slightly reassured, but at the same time not many younger people have had their 2nd dose yet so it remains to be seen!