I think 3 weeks is a little premature to be honest hun. I’m 6 weeks tomorrow and I’ve been doing light stuff for the last few days, just a bit of Wii Fit p, hula hoop and a dvd. If I were you I’d wait til your 5 weeks at least and if you want to jog invest in a very good high impact sports bra you don’t want them moving at all but I’d probably leave the jogging until you get your exercise sign off for that x