1. loss of hearing: can be due because of trying too hard and holding your breath too long to achieve an orgasm, too much excitement can cause the same.
2. blurry vision: If you get up straight after having sex, you may go light headed and have blurry vision but this is temporary and doesn't last longer.
3. abdominal pain:after intercourse can be due to impact but it can also be due to pelvic
PS: if you experience pain after sex that you consult with your doctor/ gynaecologist
for further evaluation and to rule out any serious causes.