Feeling Really Sick after eating tonight

Hi all, Im feeling really ill right now and would like to ask a question.
Today is day 2 taking 3 Met 500mg, and Simvastatin.
I started with breakfast of Bran and Skimmed Milk, went to work, started feeling like I usually do when I have my break late, had a bottle of Oasis and a small pack of Salami as I was in a rush (I know its not so good), after that I felt fine, just thirsty.
I got home and my mum had cooked a hot pot type dinner with pork, sweet pot, onion, corgette and a tiny bit of potato, I felt fine whilst eating it but as soon as I had finished I started feeling ill, had pains in my stomach, felt cold, shakey, my head was feeling strange like my head was being squeezed and feeling dizzy, after a while I started feeling sick, in waves, but wasnt. Ive been testing my blood since and its only low 4s. Its now 3.5 hours since I ate and I still feel ill, Im really cold, and have different stomach pains and my head is still strange. I have got IBS, but this is different to that, although I have been to the loo (TMI) 3 times since, and I also took 2 cocodamol for my leg at the same time as my Met. I know this is too quick to be food poisoning, and feels different to my IBS, so do you guys have any ideas as to what this could be?

I was wondering. Its my first one since diagnosis, is there anything I should or shouldnt be doing? Thanks

Thankyou, Ive already tested half a dozen times in 4 hours to check its not my BG making me feel like this.

Still feeling ill today, I fasted for 16 hours and Ive just had a slice of Burgen toast. Im a bit concerned about fasting for so long, but I didnt want it to all start again.