Constipation after food poisoning/diarrhea?

So, around three or four days ago by the time this posts (July 3rd), we had celebrated the fourth of July a bit early--grilling food and whatnot (keep in mind, this is different from my usual diet -- it's not healthy by any means, but...) , and after eating I became nauseous an hour or so after and was in the bathroom for an hour or so after that -- for once I think I managed to completely empty my bowels, because aside frmo the occasional cramp, I was okay. Anxious as could be due to being an awful hypochondriac and suffering from severe stress alongside that due to the symptoms a week prior, but okay enough.

Since then I've gone three or four days without a 'decent' bowel movement, despite knowing I've eaten well enough to produce one. I had passed mucus, and maybe one stool the day after my sickness, but nothing substantial. I do drink coffee/had fiber over the course of a few days and it has had no effect. I've had cramps both on my lower back (mainly on my left lower quadrant, but it can span to both.), around my naval area, and just my abdomen in general. I don't think I'm bloated?? But I'm never quite sure when it comes to that, due to being partially overweight. ( Embarrassing to admit, I'm not terribly over where I should be, but it's enough to notice. ) 

I haven't been feverish, I don't think -- but I have been extremely stressed/anxious thanks to the pain. Any idea on what to do here?

I had the same symptoms and I had been ignoring going to the doctor until a nurse said I had to make an appontment to get this sorted out. I saw the Doctor last night and was given Mebervine. I had been using Luxido which is a laxative. I have severe stomac cramps but I use heat pads on my stomach and in a catalogue I saw a massager which is to stop the cramps. Like yourself, life isn't very pleasant but I am hoping that Meberive will help. The doctor diagnosed IBS .

I was also very distressed by the pain and was really weak after moving my bowels and I was beginnng to feel really stressed and low in mood. I do suffer from Depression and my nurse said make an appointment to see your GP.Hope this helps.

Thank you so so much for replying! 

I'll see if I can schedule an appointment soon, symptoms today have me awful worried, though there's a chance it might be stress/anxiety adding to it... (cramps, clumps of mucus, feverish but no red face, the whole shebang)

I'm unsure if I'm still sick thanks to back then, or if my mind is tricking me into believing that -- either way, this is incredibly distressing...

The same thing happened to me back in Feb. I am now seeing a naturopath as I continue to struggle with constipation as a result. Dealing with ibs for the first time in my life.