Awww georgie boy don't panic you are probably OK. I think it is highly unlikely you will get an infection, probably just a lump(s) that can take a LONG time to go away. I am pretty sure this is different than an abcess and don't see how you can get an infection unless in adition to doing a bad injection you forgot to use alcohol on vial and skin or used dirty gear. (ie. I disagree with the last poster.) Also I think the gear will still absorb into your system.
I am not an expert but this happened to me with winny injections awhile ago and thats what ppl here and other boards gave me for advise and they were right. I was going nuts on spot injections all over the place and got 2 lumps. After about a month they are gone.
What are you using?
Take care!