Bro - I have what sounds like a similar problem. Every shot of test (omna, testoviron, ICN, anything by QV- whatever) I get a red swollen painful lump in that spot that lasts about a week. The only thing I have been able to do once I tried different brands and esters is dilute it with another AS at a minimum of 1:1, 1:2 works better.
For example do 1mL enan (250mg/mL) with 2mL fina (75mg/mL) eod. Split the shot into 2 locations, 1.5mL ea (L & R tris for example).
Hope this helps.