Hello im 30 year old male, I used a desensitising spray "stud 100" before a sexual intercourse, I applied 3 to 4 times and waited for 5 mins but I believe I had a slight bruise on the shaft of my penis and applied the spray on that. Now its been 8 days since I applied that and I cannot have a proper erection and struggling to stay hard. If you could help that would be greatly appreciated.