I've got a gut feeling

I could have seen it coming. I was a little nauseous in the morning and had felt  'off' the night before. Hindsight 20/20.

Late in the afternoon on Monday, my lower abdomen started to feel
painful and bloated. I ignored it and continued working. But the pain
got worse and when I realised I was having another one of what I think
is IBS/spastic colon episodes, it was too late. The first and second time it
happened, also at work, I made use of a stress relief room we had. I
could lie down there and wait for it to pass. But we've moved
buildings, no longer have that room and it was 6pm. I didn't fancy
spending the night at work.

My boss called me a taxi and I tried to relax in the back seat. By this
time, I could not stand or sit up straight and was unable to talk much.

I seemed a litte better when we got to my house, but when I got up off
the back seat the pain returned in full force. I paid the driver his 71
euro and then literally crawled up the stairs on my hands and knees.
Inside I grabbed a bucket for emergencies and eased myself down on the bed. I tried to
get undressed, but could only manage an item of clothing every half
hour or so. I was moaning out loud for the next few hours.

I must have fallen asleep around 10 or 11pm and then woke 3am, feeling
somewhat better. I managed to get up to get a sip of water, I had
become a little dehydrated. But I couldn't keep the water down.

It's 10.30am now, my belly's still tender but only painful when I press
it or move around too much. I feel a little feverish and my head hurts.

The last time I approached my GP about this, he said IBS is hard to
determine and he seemed unwilling to investigate. Maybe it's time I put
some pressure on him, or consult his colleague.