Re: Reg problems with use of condom
Some condoms are wider than others. If the condom you used was too wide for you, it wouldn't stretch thin enough to feel much through it. You can find how wide condoms are online.
When we're nervous, it's really difficult to maintain an erection. Achieving and maintaining an erection is done (in large part) by relaxing smooth muscle tissue in the penis, so even subconscious fear(s) can cause impotence. Might you have just been too nervous? Nervousness and/or negative thoughts are the most common cause of erectile dysfunction in young men.
Next most commonly, many prescription medications, recreational drugs and alcohol cause impotence as well.
If you also have low sex drive, you may have low androgen (male hormone) levels, low sensitivity to androgens, or other hormones could be interfering (like prolactin or estrogen). Small testicles, weak erections and orgasms, etc. might tend to indicate low hormones or other hormonal disturbance. Do you get enough sunlight? (vitamin D) What's your eating like? There are many causes of impotence and low libido.
There's also a possibility, IF you have any symptoms of an infection, that might cause erectile dysfunction too. If it were a very mild infection, you might not have noticed it yet?
It's less likely, but also possible that the problem could have to do with circumcision, which takes away a lot of sensitivity making condoms considerably less pleasant/tolerable. There are things you can do to increase sensitivity in that case; some are really easy. (Even if you weren't circumcised, you could have lost a lot of sensitivity if your foreskin is too short to cover the glans well.) You can enjoy using condoms more (and sex generally) by increasing sensitivity.
A doctor could answer your questions MUCH better.