If the pain is isolated to the lower leg and not present higher up the leg then I would act with caution. There are other conditions which could be at play and a DVT being the worse case scenario. You have nerves, muscles, tendons and ligaments, all which can cause issues with some "just" needing time, rest and careful adjustment of training regimes whilst others can have a more nefarious and ominous root cause. DVTs can become less of an issue on their own without intervention however, do you want to take that risk?
I appreciate that those members who live in the USA may have issues with their health insurer, co-pay and access to Health-Care-Professionals so here is some light reading:
Just be mindful that any intra muscular injection, any form of medication, especially from UGLs have the potential to have a negative impact and, of course the well known pre-dispositions (age, sex, weight blablabla).
Again - just my educated opinion. You feel ill - 999/911 and ED