It's probably a blood blister. Maybe you bit the inside of your mouth while you were sleeping. Doesn't sound like any STD I know of.
Insomnia is not a symptom of an std.
See your Doctor. STD Herpes or friction blister -get it checked by a clinic.
Itching
If you have a blister on your clitoris with a strong odor you may have an STD like herpes. You will need to see your doctor as soon as possible to start treatment. Most STD's can be treated. Also be sure to tell sexual partners if an STD is the source.
It is usually caused by a bacterail infection, however sometimes it can be a symptom of an STD.
No unless you have an std.
Yes unless he has a STD.
Probably a STD or a food allergy.
Syphilis can cause sores around the mouth.
No, its not necessarily. You might have developed some kind of allergy. But if the problem persists, consult your doctor.
This would not be good to do as many STDs can be contracted in the mouth.
Unless one of you has a STD or is unclean there are no side effects.