I just started doing PE 4 days ago and I am using the newbie routine. When I jelq, I usually start off at around 70% erection and after about 5-6 jelq it falls down to around 20%. If I stop jelqing I can stimulate myself back to about 70-80% in around 10 seconds. Then when I start back jelqing it will go back to 20%. Has anyone experienced this? What can I do?