I normally do 2x10min sessions per day, that day I just did the one single 10min session.
Sorry, I should have included all that detail in the opening post. Thanks for your help, both of you.
I know it seems like the very small increase in pressure, in a conservative time frame, should have had no ill effect, but the difference in erection strength and ejaculation force was immediate the next day. I didn’t think I had overpumped until I experienced those issues.
More detail, the reason I overpumped was because I guide myself by the feel of force/pressure in my penis while pumping. I had a 5mg Valium a couple hours before for some neck issues, so I guess I was less sensitive to how much pressure/force I was feeling and found myself pumping at slightly higher pressure to get the same feeling.
I was definitely not out of it though, time and pressure numbers are accurate.