At 18 weeks into my pregnancy I was already experiencing swelling. Yep..it can happen that early. This is my first pregnancy.
i feel for u cuz with my daughter my feet were so bad u could feel the water jiggle when i walked yuck!!! so see if ur spilling protien at midwife and get ur blood pressure checked just to be on the safe side good luck
Try to cut out more salt and drink more water.
It is common to have some foot swelling in this heat .How is your blood pressure? It may be nothing, but sometimes it can be a sign of preeclampsia, I would go have it checked out to be sure.