Although you are still feeling reasonably energetic your bump may be starting to make you feel a little breathless which can be caused by your baby taking up more room but also by anaemia. You will have a blood test at 28 weeks to check that your iron levels are ok but if you find that you are really struggling it may be worth speaking to your GP.
Haemorrhoids are a horrible side effect of pregnancy. Again caused by the added pressure of your baby on your digestive system – couple this with some constipation and you may find yourself suffering. Make sure you keep hydrated and have lots of fibre. This should hopefully keep your stools soft so you won’t need to strain.
It is difficult not to stress about weight gain especially in the second trimester when baby is piling on the ounces. Try to eat in moderation and take some regular light exercise.