Could a dtap or mmr vaccine cause dizziness, headaches, fatigue, weakness a week and a half after the immunizations?

Unfortunately: Yes---- we hope that it will wear off.

It would be very : Unlikely to be associated with a tdap vaccine that far out. A few people develop a short-term mild rash, fever, swollen glands, or joint pain & stiffness up to 10 days after an mmr. Call your doctor if you have difficulty breathing, dizziness, rapid heart beat, hives, or weakness.

Unlikely: Systemic symptoms result from vaccines. Ten % of children have fever, malaise and rash 5–21 days after first vaccine; 5% develop temporary joint pain. Older women are at risk of joint pain, acute and chronic arthritis. Headaches, uri, stuffy nose, sore throat, joint pain, headaches, diarrhea and fever may occur but are not common and usually gone by 10 days. Can happen, but not often.