If you worked for 10 days continuously (i.e. 2 weeks), you have to sign off for those 2 weeks, and would not be entitled to Jobseeker's payment for those weeks.
If you're working a day here and there, as FutureProof said, you can claim for the days you're not working.
If you're on Jobseeker's Allowance, bear in mind it is means-tested, so the Local Office will require proof of your earnings to check your entitlements.
I suggest you call to the local office as soon as you can and give them the details.