Need advice about my swollen ankle

Autumn

So yesterday I noticed that my ankle hurt and when I looked I saw that my ankle was much bigger than my other one. I looked it up to see if it was normal to have only one swollen ankle but I couldn’t really find much of an answer on if it was normal or not. When I woke up this morning my swelling had gone down and I wasn’t feeling any pain. Tonight it is swollen more than last night but I’m not feeling as much pain. I’m 34 weeks. Has this happened to anyone else? Advice?