^^^ This is one of those things that you'll probably be fine if you're an otherwise healthy individual however there are no guarantees, the stakes are high and it is definitely not advised.
Exactly. You really shouldn't do this. If I placed a bet on whether you would be OK or not. I'd bet $1,000 that you would be fine. But that doesn't mean anything. The thing about dirty shots is, that probability catches up with you eventually. Each individual shot you take, where you take unnecessary risks, the chances are slim that you'll lose your arm or some such thing. But if you keep spinning that wheel again and again, well - statistically while no one can pin-point when the "bad"shot will eventually happen, chances are that it will.
And you can't just keep taking " once-off " shots and think of it that way. You really need to get rid of that chance by instilling a policy of NEVER doing those dirty shots.
Personally - I've done just about every gross thing you can do with a fit and every dangerous thing and every stupid thing and I've never gotten an infection, a disease, an abscess or any bad thing beyond some gross looking swelling, bleeding, bruising, etc. I've had plenty of horrible looking histamine reactions (huge welts, generally around the site, sometimes the whole arm and occasionally all over my body and swollen lips and cheeks and shit too. But it's always gone down again within an hour or two.)
But - I've known other people to have only occasionally slipped-up and ended up losing a finger, or getting a really nasty infection on their arm (in a different person to the finger).
Basically - if you do something stupid like inject a bloody shot (or a fucking cocktail of various bloody shots, which it sounds like is what you're doing) TWENTY-FOUR hours after the original shots - you're seriously asking for some trouble.
Generally speaking - DO NOT KEEP YOUR FILTERS to perform "washes"with. Don't inject a missed/bloody shot once a fairly short amount of time has lapsed. Personally - if I get blood in the fit, if I can't get a good shot within 5 minutes, then I'll just consider if a bust and squity it up my nose, which I know is a total waste. But at some point, you really do need to cut your losses.
When I was younger, I took way more risks - injecting pharms, mdma tablets (Es), re-using really dirty fits without really cleaning them, all sorts of stupid shit and I guess I was lucky.
These days, I'm in my 30's and just thinking about some of the dumb stuff I used to do makes me dry-reach in revulsion!!!
Seriously - take care of yourself. The reality is, antibiotics are becoming MORE and MORE useless as time goes on. Or - more to the point, bacteria is becoming more and more antibiotic resistant. I'm old enough to remember when taking antibiotics used to always clear up an infection almost immediately. These days, quite often I will need multiple COURSES of antibiotics to clear an infection. Sometimes they come back, linger, etc.
Infections are becoming super dangerous again.
Please don't take risks beyond the absolute necessary (the original, CLEAN shot).