Hi @MinnieMounjaro, may I just clarify with you that when you say that you use the same needle every time, you do mean the same type of, and measurement, but not the same actual needle? I am only making sure because if you used the same actual needle each time, you wouidd be risking getting a very serious infection - although I am sure that a 'single use' needle would not survive even 2 months worth of injections, never mind 9 months worth!
My other slight worry is that you said that you only use one of two same areas for your injection sites. It is extremely important that if someone gives themselves regular injections they always rotate the sites that they use. So the most important things when injecting Mounjaro etc, is that you always inject it into different areas of your chosen site, which are usually; the abdomen, the thighs, or your upper arms, as they usually have enough fat lying underneath the skin, as that is how these WLIs work. They need to be absorbed into enough fat that the drug will take a prolonged time to reach the blood stream, so that the MJ dose (in this instance) can hopefully last for the whole week, before needing to be taken all over again.
Therefore, when using your abdominal area, you shouldn't go too close to your belly button - as the skin is far too thin there to deal with a dose of any or these weight loss drugs. But they also need to be far enough away from the exact position of your last injection sites, so that you don't get a build up of - what I can best describe as - small areas of scar tissue, underneath your top layer of skin, as then the MJ might not get absorbed at all, and, therefore, that could also lead to quite a high risk of the needle itself breaking. As long as you don't inject anything else into your abdomen - I inject Insulin 2 or 3 times a day as I have Diabetes - then it should be quite easy to not inject into the same place every few days.
So, like SilenceInside said, you most likely only nicked one of your tiniest little blood vessels, so just try to avoid that exact place, at least for a while. If you had caused more damage by the needle maybe bouncing of a small amount of scar tissue, it would have probably bled for longer! If you didn't get a pamphlet when you first received your initial MJ pen, then please just look up on the internet what you should do if some blood does comes out of an injection site. I'm sorry that I am not explaining it here, but it is 4.40am, and I need to get to bed!! Good luck with what I hope is your continued success, Minnie xxx