Questions about aftercare

Cycle

Hi team, After several negative ICSI I always got my period after about 4 days after stopping the medication. The same applies to the last ICSI. Now I'm expecting my period in the 2nd trimester. Cycle. Cycle day 34 no bleeding or signs. On day 33, the pregnancy test was negative. Could it still be related to the medication? Always have a cycle of 27,28 days and are always on time. LG