If the check engine light is flashing, have it towed. Otherwise what the others have said is good advice. Even a short period of misfiring can result in cat damage, and that is much more expensive than replacing a coil pack or two. Get the codes read, and post them here. The coil swap is clean and easy work.

Good luck!

Have you kept your maintenance up?

Worst case would be if your ignition system was not in good shape for a while, this multi cylinder misfire could damage or ruin your catalytic converter.

I recently purchased a used XC70 with 80K miles.

As a precaution, I had my dealer change the spark plugs - they were marked Ford - evidence that they were original and had not been changed on schedule.

Since the car had maintenance records from a private Volvo indie, I suspect that the plugs had been inspected and looked ok and were left in the car - setting me up for some sort of failure before the second plug change was due.

Another gotcha is the serpentine belt - modern EPDM belts do not show their age by cracking - they do wear out like tires and slip later in life. If you do not change them on schedule, they should be read with a gauge by a tech.

An autoparts store will read the codes for free. Do that. It sounds like more than one cylinder is misfiring and if that is the case, the code will indicate which ones. Replacing a coil requires a 10mm wrench and a torx to remove the cover.

You can drive it, but I would unplug the injector for the bad cylinder.
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Keeping it running is better than buying new

Take it a nearby auto parts store that will read engine codes for free. See what they say.

My concern with driving it very far as-is would be that a serious misfire (i.e. a dead cylinder) will send 20% of your raw fuel into the catalytic converter. That could cause the converter to get very hot and possibly start a fire. But other than that...

Greg