It might very well be a coincidence. A few days after I started vaping, I began to have a really bad stomach ache. My husband swore it had to do with vaping. As the day went on, pain got worse, I ended up in the ER. Hubs took my ecig, and a bottle of juice with us. When he asked the doc about it, doc just kinda grinned and told him no, it wasn't that. After many tests, and a few hours later, I was in the OR having an emergency appendectomy. Seems when we began to vape, and get sick, the first thing we think is it's the liquid/ecig. Not always true.
Again, I hope you feel better real soon. And if vaping hurts your throat, do not vape.