Not much. You might stick it too far in and if you can't get it out you have to go to the gyno.
Yes, a man would know if you have a tampon in when he inserts his fingers into your vagina. He would be able to feel the tampon inside the vagina.
Most of the time, women who think they've lost a tampon have not. If you aren't sure, squat down and put one finger in your vagina as you bear down. You'll feel the cervix, with a texture like your nose, at the end of your vagina. Feel around the outside of the cervix (like drawing a circle with your finger around your nose). Do you feel a tampon? if not, there's probably not one there. If you're still not convinced, see your health care provider or your local family planning agency. They can reassure you in a matter of minutes.
You can't cause a miscarriage by putting a tampon in your vagina. You also can't cause one from a finger, sex toy, or penis in your vagina.
Leaving a tampon wouldn't be my first guess if I were dizzy, but it's easy to check. Squat down and put a finger in your vagina. If you feel the tampon, then remove it. If you don't, and you're still convinced there's on in there, see your health care provider or your local family planning agency. I promise they've seen patients for this complaint before.
Yes, a period is a result of hormones and wearing or not wearing a tampon has nothing to do with it. Never ever wear a tampon without having a period. Read the warnings on the tampon box because it tells you not to do that.
If you can still see the tampon once it's inserted then you've not inserted it far enougj. Remove the tampon and try again later, this time insert higher - it's best to use non-applicator tampon so you have better control over insertion.
Nothing will happen, it's just like wearing a tampon at any other time. It is possible for water to be absorbed by the tampon, meaning it can leak or feel a little uncomfortable, so make sure to time it to insert just before you go swimming and check after half an hour to an hour.
If your tampon isn't in properly, it could leak or you could experience discomfort. Those are the worst possible outcomes.
Yes, you would be able to feel if there was a tampon still within your vagina. If you suspect you may still have a tampon in place clean your hands and insert fingers vaginally to feel around the vaginal canal to check - your vaginal canal isn't that long so you should be able to reach easily, but if you do struggle try to squat and push down as if you were passing a bowel movement. If you can't tell if there is a tampon there then you should tell someone to ask for help or see your doctor.
Nothing, it is natural.
If you put your finger on a hot ember you will burn it
nothing, unless its not clean.