Your address could be used by the spammer to send spam emails as if they were genuine emails from you to anyone who he has an address for, not necessarily people whom you know.
Theere is nothing you can do to stop that happening now that your address is known. They will only use it for a day or so, so don't worry about it.
As for getting infected, malware etc cannot get onto your computer via an email, only either by you clicking on a link to go to a web site or by you clicking to open an attachment to the email. As you didn't click the link, you are fine.
Just to put your mind at rest you can download and run a scan with Malwarebyte Anti Malware (MBAM)
please download
MalwareBytes' AntiMalware using the BLUE button for the FREE version.
* Double-click
mbam-setup.exe and follow the prompts to install the program.
* At the end, be sure a checkmark is placed next to the following:
o Update Malwarebytes' Anti-Malware
o Launch Malwarebytes' Anti-Malware
* Then click
Finish
If an update is found, it will download and install the latest version.
* Once the program has loaded, select > Perform Quick Scan, then click > Scan.
* When the scan is complete, click > OK, then > Show Results to view the results. It will most likely say nothing was detected, in that case just close the program. If it did find anything:
* Be sure that everything is checked, and click > Remove Selected.
* When completed, a log will open in Notepad. Save this log to My Documents in case it is needed for reference.
It is worth keeping on your computer and updating and running a quick scan once a week. It only takes 2 or 3 minutes to run a scan so it is not time consuming.
dave