anyone ever have blood clots where a lumpy thing shows up on your leg?

just got it this morning. my leg has a rash on it too, I've been putting antibiotic stuff on it, I have an appt tom with a vascular doctor, just wondered why it showed up so lumpy like that and water seems to be on it too, I don't like going to er's so I'm just going to wait till tom and see my doctor then, this is the first time that's ever happened. hopefully, it wont get worse before then, just wondered what they'll do tom and if I'm going to get stuck with surgery or end up in the hospital or ER. anyone ever have this happen? and what was it?