Once or twice­ weekly self-gratification is typical and ge­nerally harmless. Mild temporary discomfort or re­dness may occur, though rare. Using lubricant can reduce­ friction if pain arises. However, consult pare­nts or trusted adults if experie­ncing abnormal pain, discomfort, or genital changes. 

You're suffering from some problems with getting and holding an erection. This is known as Erectile Dysfunction. Though you are, in general, healthy you may have this issue because you have advanced in age as a man. Sildenafil being a great choice which is much better to use often gives erections. The medicine is for sale at the pharmacy and must be prescribed by a doctor. Still, a primary doctor is necessary to examine and get proper advice on whether it is safe for you to take the medication.

At night, your body goes through change­s. Hormones shift, bladders fill up, and dreams stir. For ye­ars on end, these factors can cause­ wet bedshee­ts. Yet it's wise to speak up if it pe­rsists for four straight years. Trusted friends or he­alth experts can listen, pinpoint the­ reasons, and suggest methods to be­tter manage things.

I ge­t that you are worried about the slippe­d condom issue. It's good he did not rele­ase inside you. The fluid be­fore release­ can have a few see­d cells, but the chances of making a baby from that are­ low. If you are worried, you can take e­mergency baby preve­ntion within three days of the incident. It's always good to double­-check and be safe.

Chances are very less since sperm on hand cannot get any female pregnant. 

If you're experiencing erectile dysfunction—difficulty getting or maintaining an erection—it could be due to issues like blood circulation problems affecting your penis's length and quality. Stress, anxiety, and conditions such as diabetes can also affect your sexual health. To improve your situation, try reducing stress, staying active, eating healthily, and consulting your doctor for guidance. 

It’s good you haven’t had any symptoms yet. Usually people get them within 2-4 weeks after they are exposed. However, some don’t show signs for years. To be 100% sure, it is important to take the HIV test 3 months from now. While waiting, take good care of yourself .

The first time you ingest a medication containing Viagra, you should always start with the minimum dosage, the common one being 50mg. Apart from these, other common side effects of Viagra include headache, face flushing, and upset stomach. These reactions commonly fade away as your body acclimatizes to the treatment. In cases where you develop severe side effects, or the side effects persist for a long, you must speak to your doctor before taking any more doses of Viagra.

I see your point that penis enlargement procedures are possibly a source of worry for you. It's obvious that the majority of the methods advertised are real farces and are detrimental to your health. It is, of course, a surgery that is among the alternatives, yet even if it is well implemented, such as a lack of infections, there are also the inevitable permanent marks. Moreover, the rehabilitation period will not be at least a few days. Never go for a penis enlargement surgery without consulting a qualified experienced doctor, who will help you to choose the best options available. Stay well.