Almost 10 Weeks Post Lapidus; Foot Is Either Really Cold Or Hot And Swollen - No Happy Medium

It seems my surgery foot swings back and forth between really cold and hot/swollen, with no comfortable regular temperature in between. It's been cold since I got my stitches removed at week 2. Once I started walking around the house FWB (week 7), it did warm up a little, but then I get these flare-ups (probably from walking on it?) where my foot will swell up and get hot. On PT days, I'll give my foot a break and not walk on it, but even that one day of inactivity will make my foot go really cold again. I've tried warming it up with a heat pad and it felt wonderful, but the heat also made my foot flare up into a hot/swelling episode. Are these extreme temperatures normal? Is my foot always going to be stuck between miserably cold and painfully hot and swollen?