Hard lump at the top of bicep after injection

[Blc302]

first cycle been lifting about 3 years straight, on and off the years prior. Decided to try Enantat 250 dragon pharma at 500mg a week pinning twice a week. Into my third week and have had pip every pin but tolerable can still lift just fine. This past week I felt a hard lump between my bicep and delt. Using 22g 1in to draw and inject with all sterile techniques and even have my main lifting partner who's cycling the same as well inject me, being he's a emt and know what he's doing. I've read a lot but mostly just finding the shit about lumps at injection site which this is not. Have had slight redness and warmth but lasted a day and no test flu. Sorry for the long post but anyone experience this?

 

[KillaBig]

Was it your first time injecting into the bicep?

 

[Blc302]

Didn't inject in bicep did in delt