Sex for the first time in a long time

I had sex for the first time in 6.5 months. The guy I did it with was really bigger than I was used to. Afterwards my vagina had a burning sensation and I had a strong smelling discharge in the days following. I also had a flesh like discharge similar to this, this morning.

The sex was protected and ever since then I have had a pain in my lower stomach. Are these things normal or am I just being dramatic ? HELP