Welcome daisy, sorry you're suffering so much anxiety. It's so frustrating that we can't just enjoy our BFPs! I agree about the scan. I've spoken with a sonographer friend who told me that it's unusual to see a HB under six weeks, so seeing a yolk is good, as it shows the pregnancy is in the womb and not ectopic, so your pain is probably just womb stretching or bowels. I had a similar scan at 5+4, clinic wants to wait until I'm over 7 to repeat as no heartbeat then would indicate pregnancy not growing. When is your next scan?
Rational The tugging is so weird, never had it before! Small meals seem to help me quite a bit with nausea, hope you can get another proper rest tonight.
Becky I'm tender when coughing and sneezing too, bloody hayfever! Still a bit worried I'll sneeze the baby our but I reckon that's not actually possible 
Decaf hope your migraine is better and that the bleeding has stayed away today.
Dame, reassuring your symptoms have been on and off too. I've had the massive appetite, too. Woke up last night around 3:00 for a wee and had was so hungry it hurt! Actually kept me up and had to have a snack.
AFM, feeling less knackered than last week and not had much cramping or tugging today. Felt alright after breakfast but my train came to a sudden stop and I almost got sick! Was nauseous for the rest of the morning. But then massive appetite returned and been eating all afternoon and dinner. Also having loads of discharge and keep running to the loo for knicker watch. Can't believe how far away next week's scan feels...xxx