Foreskin not returning over bellend

So, basically, the other day my girlfriend & I were unergoing some sexual beheviour (She was quite vigeriously giving me a handjob) but it all felt fine, yeah. But I've never actually stretched my foreskin back myself, whereas from her force, she managed to get it back quite some way.

Since this (Yesterday, 17 hours ago) my foreskin has come back up, but only, this time it isn't completely covering my bellend, whereas it was before. 90% is covered, but the very top is visable, as if the foreskin is too.. "floopy", or "loose" to cover my bellend back up again. It is literally just a circle shape at the top of my penis, and that is the only part which isn't covered up, but I feel like it should be. I'm not really sure what to do/If I should be worried. 

I'm 16 and not circumcised. 

 

All is fine.  Nothing to worry about.  Not all foreskin cover the penis completely.

Ideally, to maximise penis size and good penis health follow this advice.

When masturbating dont apply a lot of pressure.  It can damage the delicate 3 spongy chambers of the penis.  You want energy to go to growth not repair. So give it a rest for a while if you dont get strong erections.  Masturbate once every 4 days at the most.

Be as thin and muscular as possible.  This will improve circulation and blood flow to the penis.  Exercise will also increase male hormones like testosterone.

With the penis fully repaired you should get spontaneous erections.  The exercise will also make you hornier and increase spontaneous erections.  You want spontaneous erections (erections without having to touch the penis).  With the increase blood flow from the exercise- strong long lasting spontaneous will expand the penis.

Following this method can also cure a tight foreskin because with the spongy chambers repaired they push out agains the foreskin.  This constant pushing creates new skin.

Use cold showers before bed to get rid of hotness and horniess.

Before this happened, it had covered the whole penis. But there's definitely nothing to worry about? I was thunking maybe there was a slight tear?Also, there is a tiny bit of red on the tip, as if it may be blood? Will the foreskin go back to how it was before, either? 

Hey, enjoy being 16, there's nothing wrong with you that a few days to heal won't repair. The advice by James0001 to be lean and muscular is the best advice for anyone of any age. Intense hill-climbing will do wonders for your sex life although at 16 I doubt that you need any more ability!