@TabithaTittlemouse. Don't feel stupid. I'm an accountant & it took me ages to decide what to do.
I was offered a new fixed price deal in September as my fixed period was coming to an end, they said I'd save £5 (over the year) if I re fixed. I didn't because I didn't want to be tied in & I was busy so didn't give it much thought.
Oct I rang BG & the girl confirmed that deal was no longer available but the xyz deal was, but she said I'd be better to wait as they'd send me another offer if a deal, so I did. I git that in Nov (already high than the Sept deal, woukd cost me more that either previous fixed deals & cheaper to stay on SV. BUT I was worried how much it might go up by.
I had lots of scribbles, & decided to fix, on the basis that I'm not a high user (live alone) and I'd rather know what my bill is going to be than risk a huge price rise.
Then after I'd done that Martin Lewis came out with his explanation/graphs etc saying to stick... typical.
However, for ME, I'm not unhappy I chose to fix, I don't think I'll either save or lose much, but I have peace of mind (for a couple of years anyway!!)
I suggest you watch & read what Martin Lewis has to say & understand it, before you decide what to do,