birth control pills include hormones that affect the immune system quite significantly, and can increase your risks at developing MS (which is well ... very similar to the lyme disease symptoms). So i would say the birth control pills are to blame. Them plus your history of lyme => more MS/lyme symptoms
https://www.ncbi.nlm.nih.gov/pmc/articles/pmc5592309/"Six studies (3 cohort studies and 3 case-control studies) were identified that evaluated the impact of cHCs on the subsequent development of multiple sclerosis (Supplemental Table 6). Two studies showed a significantly increased risk for the development of multiple sclerosis with “ever use” of cHCs (Hellwig et al. 2016; Kotzamani et al. 2012) with a similarly increase risk noted in one study for current use or past use (Hellwig et al. 2016). Overall these studies suggest that use of cHCs may convey an increased risk for the subsequent development of multiple sclerosis."