The swelling on on side is always a suspicion of DVT, which can have a serious complication like migration of clot in lung. So best course here is to rule that out. We need to work on high caution here for your one sided symptoms as yours and won't recommend waiting for couple of days.
Once the DVT is ruled out; there is nothing worrisome and one may employ the following measures (some of which we had discussed);
1) Avoid prolonged standing or walking for long distances in a single stretch.
2) Whenever you sit; keep your legs elevated on a chair or a sofa or stool.Do not hang the legs, otherwise gravity will increase the swelling.
3) Exercises / physical therapy
a) Lie down straight and raise your leg and feet for 10-20 seconds. Repeat this for ten times (twice a day whole set).
b) When you sit; pull the feet towards you for 10-20 seconds. Repeat it for ten times twice a day.
4) Raise leg end of your bed by 6 inches.
It is privilege assisting you.
Please let me know if you have further queries or unanswered questions.
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Wishing you all the very best in life.