OK so a little context here, I've been running since February of this year, having always been a treadmill runner some friends convinced me to sign up for a 5K and I started running outside and caught the bug in a major way. When I first started I suffered from shin splints, which I now realise was probably from trying to do too much at once and too fast. They went away after a while, when I learned to dial down the intensity for day to day running and save the hard efforts for race days.
Recently I decided it was time for new running shoes as I'd been using the same pair since I started in February and Black Friday seemed like the ideal time. My old pair were really comfortable and I never had any issues (Asics Dynaflyte 3) so I was planning on getting the same pair again but I couldn't see any deals on them. A friend recommended Adidas Ultraboost and the Adidas website had a black friday sale so I ordered a pair in size 10 (same as my Asics) I picked them up Saturday, tried them on in the store and they felt good.
Sunday I decided to take the new pair out for a spin on my weekly long run, my feet felt a bit weird for the first couple of miles but I figured that was just due to me being used to the old pair and after a while I got used to it and by the end of 10 miles they felt fine. But when I went out for a training run on Tuesday with a friend in my old pair my right shin was really painful, I struggled through as I didn't want to let my friend down but by the end I was in agony, we only did 4 miles at a normal pace so I was worried. I rested wed & thurs and today I tried going out a very gentle pace in the new pair but the same thing again, I had to stop after less than 3 miles as I was in agony.
I don't know what to do at this point, I haven't stepped up my training or intensity and my shins had been fine for months before, since September I've been comfortably averaging about 25 miles per week and competed in a couple of 10k's. The only thing I can put it down to is these new shoes but having used them twice I don't think I'd be able to return them so I'm worried I've wasted £90.
Should I take a break and then try the new pair again? Try and return them? See if I can sell them as used somewhere? I'm at a bit of a loss and frustrated. I'm supposed to be competing in a 10k on Wednesday evening but I'm worried I'm not going to be able to now.
Sorry for the rambling post, I needed to vent. Any advice would be appreciated.