Vance,
Thanks for your comment. I appreciate that. You are dead right. I actually got myself checked out at the STD clinic today. They put it down to the sex being for me, a bit rougher than I was used to! No infection detected but they are running the usual tests. With "getting head" one is perhaps tempted to not insist on condoms with a seemingly good quality worker, but of course, there's some danger in not doing. I have read the threads here about oral sex being a lower class of risk. A lot is down to judgement calls but I don't fancy being down at the STD clinic every time I get head! So perhaps that's my answering my question. The ideal of course is to get a regular girlfriend. Thanks again!
Symptoms do not show the day after, I would not be conerned with a STD.