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a spider
There are a few small bugs that are triangular in shape namely Troilus luridus, Sloe Bug, Striped Shieldbug, Green Shield Bug.
lady bug!
An ant, or a spider!
A beetle is a small round bug with a hard shell. There are several beetles that are black spotted. One example of a black spotted beetle is a lady bug.
Stinkbugs are shaped like beetles even though they are a different type of insect. They are usually half brown and half black.
Soldier beetle also known as the cantharis rustica
There are many types of black teardrop shaped bugs. It could be a type a beetle, flea, or even a tick.
firefly
Pill bugs, also known as isopods, have a rounded or almond shape. They are tiny bugs with a black color.
You might have been bitten by a bug and had a reaction to it and that is what happend.
beetle i guessedit!Is it harmless!