I Am On Doxycycline Hyclate 100 Mg.. I Have A

I am on doxycycline hyclate 100 mg.. I have a mild headache, does not go away, and I feel nauses. Also, I feel like my blood pressure is high. I am on bp meds, Metoprolol 25 mg, twice a day. Furosemide 40 mg 1/2 a pill once a day. And, Levolthyroxine. My question is, can I stop taking the doxcycline? I have 17 more days, out of 21, left to take. The area where the deer tic was, my Orthopedic Dr removed it and prescribed the doxycycline whle I was on a appointment with him, the area is still sensitive to touch. Please let me know what to do, I am not overly sick just light headed and all of the above, I guess just plain not doing well on this drug. Out of sorts, that is me. Thank you for your help. Terry