How Long Does Lithium Stay In The Blood Stream?

Hi, I was given high doses of lithium plus other heavy metals by my husband. After he wouldn t take me to emergency when my blood pressure was 237/9, I suffered 2 mini strokes, potential kidney failure was 2 weeks later, then intensive care. I ve had my hair tested by 2 different labs. The numbers were very close to each other. The last hair sample was sent to the 2 labs to give me monthly levels of the Lithium and other heavy metals. I wanted my hair tested from August 2016 going back as far as they can,which was Dec. 2015. 1st lab did just that, the second lab tested my hair sample from Jan. 2017 back to Dec. 2015. Problem: My levels for 2015 and few months of 2016 were 130-147 for each month. Then the numbers fluctuated and went up then by August 2016, the level of lithium was 89. The lab that tested my hair sample from Jan. 2017 back to dec. 2015 showed levels of lithium going up from August 2016 was 89, jumping in September, October to 137, nov. 140, Dec. same and January 2017 to 140. My husband has been out of the house since sept. 2nd 2016. How could the levels of my hair samples go up from August 2016 which was 89 to January 2017 to 140? I have never been prescribed Lithium or anything along those lines. Because the lithium levels went up after my husband moved out of my house, This could ruin my criminal case against my husband. I m so worried, how could this be happening? Thank you