I am having cervical reactive lymph node on my left side of neck. and having blood clotting since a week after periods. could u pls inform me about it?

Unrelated: It sounds like you have seen your doctor about the neck lump--you label it very specifically. This type of node should slowly go away as the related inflammation or infection improves. But it can take weeks, if not months. I presume you mean you continue to have some vaginal discharge with clots after menses: not unusual but check pregnancy test and see doc if doesn't clear after next period.

See answer: Is unlikely that there is a connection between the two conditions. A reactive lymph node is a non-malignant enlargement due to an infection or other antigenic stimulus. An enlarged cervical node can come from a recent sore throat, etc. Abnormal vaginal bleeding can be due to various reasons and is not necessarily a sign of illness. see>http://cle.clinic/1IDXMvq If persistent: See Gynecologist