Really? Again?

Sade
So recently I went 5 months without a period at all. Finally got one and my periods became regular. Then last month it was delayed by a week. This month I put on my calendar to mark it to a 35 day cycle just because it might have lengthened. Well. Its a week late on a 35 day cycle. (Let me also add that every test I have ever taken had a light positive within the time frame...I guess I have a naturally elevated hcg count) so I know theres a chance of pregnancy but how long should I wait given the situation? Im at least waiting another week but with my two boys I didnt test blaring positive until 6 weeks. Any advice?