I thought I'd share my experience with you so if anyone else finds themselves in a similar situation hopefully this may help.
I had laparascopic hysterectomy on 20/08/2013. I suffered wound haemorrhage back on the ward and my bp dropped to 70/30. Needed 4 bags fluid resuscitation. My abdomen became increasingly swollen during this time and i felt extremely weak and "fluffy-headed" all day every day. I told the nurse I was scared I was bleeding internally, he agreed to ask my consultant to come up and authorise a scan. consultant looked at my stomach and said it was just gas (it looked like a fully inflated beachball!) and it would go down in a few weeks. No scan done. I was discharged 3 days post op despite still feeling awful, low bp and risring temp.
I woke up the next morning with a fever of 38.5 and feeling awful. Saw out of hours gp (it being a bank holiday weekend and all) who prescribed antibiotics as I told her I feared I was bleeding internally and I was worried about Sepsis. After 4 days on augmentin I felt no better, probably worse if I could remember the days - I still have some memory loss of that weekend. I got an emergency appointment with my consultant on the wednesday (ended up being palmed off to a registrar). They didn't believe I'd had a fever all weekend or that the bruising and swelling were worsening (my stomach had continued to balloon and was blacky purple all over). I requested a blood test to put my mind at ease (and a scan to which they said there was no need as I couldn't be bleeding and still talking to them). Blood test showed I was severely anaemic and needed a blood transfusion urgently, and that my infection markers were raised and I was in severe Sepsis. So rushed to A&E and admitted for IV antibiotics, blood, scans (funnily enough they found a slow bleed and some blood clots that had become infected and caused blood poisoning/ Sepsis). If I'd left it and taken their word that it was fine I would have gone into organ failure.
After over 2 weeks I'm finally home, still on antibiotics, feeling exhausted. This has definitely set back my recovery.
If you are unsure of anything you need to persist to get it checked. Even if it comes back normal. Its better to be safe than sorry.