What is the STD risk from oral sex?

You have premature ejaculation. It is the time you cum too fast while having sex. It can arise from stress, anxiety, or low experience. Try to be calm and act gradually. You may also want to change positions or discuss it with your partner. It is normal to have this problem and you can learn how to control it. 

Not recommended long term self medication for prolonged sex. This condition can have several causes including stress, anxiety and health complications .Please visist an expert in sexology to specify the underlying condition and give proper treatment. Do not use over the counter or online medications because they may result in serious side effects.

If the condom didn't break and all the sperm is properly stored inside that bubble at the top, you should be fine. That bubble is there to catch any liquids, like sperm and is normal. Just make sure to remove the condom carefully to prevent spills. The bubble won't cause any harm.

Assuming your thumb was not injured and you only came into contact with semen on your skin, the odds of catching an infection are pretty slim. Most lower UTIs caused by E. coli are harmless and heal within a few days. Make sure to clean your hands thoroughly using soap and water to get rid of the germs. You should consider going to the hospital if you experience abnormal symptoms such as redness, swelling, or itching. 

If one suspects to have been exposed to HIV, a regular test is one of the vital things to do. There are cases where the virus needs some time to be discovered during tests. HIV symptoms are different for example vomiting, fatigue, and enlarged glands (lymph nodes). The simple statement that must be kept in mind is that using a protector for the services is the one and that is the first option. In case of any issue, do not forget to consult a doctor. 

You likely suffer from some mental health issues, such as depression, insomnia, and porn addiction for sexual satisfaction. Long-term lack of closeness can have a devastating effect. Try to negotiate with your wife about your feelings and discuss therapy or ways to improve your social skills and feel understood.

It's very doubtful that pregnancy may occur in this way as you described. Pregnancy occurs when sperm fertilizes an egg, and usually requires direct contact. However, the way you illustrated it is not the usual way of getting pregnant. Should you be anxious, listen to your body. Check for common symptoms such as missed periods, vomiting, or breast tenderness. If this is the case, then take a pregnancy test to calm your anxiety.