Ok so I've had my first flat after 3 years of cycling. It was a pinch flat with all the air going out of the tire after 3 seconds. I pulled over on the side of the road and proceeded to fix it which took 20 minutes as this was my first time fixing a flat tire. Someone please see if i did it correctly as the bike is not riding the same as before.

Turned bike upsidedown and removed the rear wheel
Took off the tire and tube from the wheel
Put on a brand new tube bontager 700x 18-23, Presta 43/46 then put the tire back on
Inflated the tube which took a while to straighen out the tire and then placed the wheel on the frame.
After riding for 5 minutes at an easy 15mph pace something seemed off.

The shifting felt fine but something with the rear wheel felt off. My tire would skid noticeably when cornering and when accelerating the transfer of power was not smooth. I feel like the bike would "jump" when I applied pressure to the pedals. Did I miss a step? It was night around 9:00pm so everything was dark but I think I followed all the steps. Having never fixed a tire before I just don't know. Did I overinflate the tire I could check because my frame pump doesn't have psi reading?

I think I might have overinflated the tire. I might have not put glue on the wheel before putting on the tire. I don't even know if this last one is a step.