Seriously, the blood clot occurrence is minuscule, we have talked about it in relation to being struck by lightning or winning a lottery.
To put it in real perspective, women take the pill daily, you have between 1 in 3000 to 1 in 10,000 chance of a clot over a year of use depending on what method you use. If you are on the pill, then worrying about AZ giving you a clot or whatever is just nuts. Just conspiracy theory hackjobs spreading this crap.
Sitting at your computer for more than an hour a day will increase your risk of DVT significantly as well as sitting in a plane, watching excessive television, etc etc.
Stop making stupid excuses, get vaccinated.
If you are susceptible to clotting, due to family history or whatever, see your GP and get a vaccine that doesn't do that.