Can you suddenly become allergic to zoloft (sertraline) and lamictal? i'm not allergic to them. yet i'm afraid it will make my tongue and throath swell. anxiety?

Fear of allergy: To be clear, you're saying you suffer from anxiety, hypochondriasis, and that you are not currently having any allergy/physical symptoms? It sounds like you are having sxs of hypochondriasis and anxiety = fear that you will develop a sudden allergy to your meds. As you've no physical symptoms at all now, risk of hypersensitivity is quite low.