Hi Viswanadh. First of all let us get some things very clear. If the problem of no erection and small penis is for one weeks only- just forget about this problem as it looks to be due to anxiety and related problem. This is self-limiting and will get OK soon. Scrotal support not given at earlier time has nothing to do with loose testes. So let us talk about your problem of loose testicles. The commonest reason for this at your age is varicocele. This means that the veins draining the scrotal area have gotten dilated and increase the temperature. The muscle of the scrotum called dartos relaxed the scrotal skin to get lengthen to cool down the testes. This is the reflex mechanism of the body to shed the extra temperature for proper functioning of the testes , namely to produce normal sperms. So please get a color doppler done and see the grade of the varicocele. Get the semen analysis done. Consult an Urologist for further diagnosis and treatment plan if needed. Avoid excessive temperatures. Do exercises in the early morning only. Have a bath with cold water. Rinse the area with cold water and see the testes are elevated for that moment only. This may not be that serious. Please keep me posted the results