lyme disease and pregnancy?

Sarah

so last month around July 29th I was diagnosed with Lyme disease I took all my anti biotics and finished them 2 weeks ago, but my period is 3 days late took 2 pregnancy test and both came back negative. could I still be pregnant or could it be the Lyme disease? help or any advice is appreciated please. ( oh and I really hope I am pregnant because me n my husband have been trying for years and we had our first misscaragae this past Valentine's day)