No two months treatment is much too short. You can read Burrascano's treatment guidelines (just google it) and try to find a Lyme Literate Doctor. Sounds to me that that doctor is no good for you...
I was treated for 3 weeks and my symptoms returned. The second time I had 6 months treatment and now my symptoms returned again...
EM rash oct. 24 2007, 10-30-08: doxy 100 mg. bid for three weeks. Felt better, but symptoms slowly got back and much worse
2-21-08 until 4-23-08: doxy 100 mg. bid (described by family doctor)
4-24-08: start doxy 200 mg. bid and Biaxin XL 1000 mg once a day (seeing an Infectious Disease Doctor)
8-8-08 until 8-21-08: adding Flagyl 500 mg. bid
8-21-08: off all ABX
9-17-08: doing herbs but symptoms slowly reappeared,so started Biaxin 500 mg. bid on 9-17-08
11-12-08: off abx, start Diflucan