Clomid

Anyone on clomid that can help me with my doubts, this is my 2nd round of clomid obgyn tood ke i would ovulate 5 to 10 days after i take the last mes on the 18th and 19th i had a pinch feeling i took and ovu.test yesterday the 21at 8:30pm and both lines we kinda dark, took a test this morning at 8:30am one control lines was dark the other line was light so is it possible i ovulated already?