Tonbridge Half Marathon Training update....

Update? More like Upset! Another set back in my Tonbridge Half Marathon Training. After doing the longest run I think possibly ever last Friday, and feeling absolutely fine, I then went out two days later and felt my calf straining again. This was only after a couple of miles and therefore was deeply frustrating as I'd only just got into my stride. I tried to walk it off and decided to shorten my run but had to end up limping home which always makes me feel like a bit of a berk when in running attire. Several days later after ice treatment, gentle stretching, wearing compression socks and a few days of walking across town to work the calf still feels tight. What to do next? All the information says rest it for a couple of weeks at least. But will I be able to resist the temptation to go out again this weekend. Knowing me probably not. I've even considered barefoot running shoes, which is a bit of a misnomer, apparently they improve your running style so that it becomes more natural. I like the sound of that. Any other tips? (Apart from: give it up you're an old man! Or take up fishing! Sensible, constructive tips please.)