So is it safe to say that if i get routine blood work and if it comes back completely normal i don't have lymphoma or anything? cbc and cmp

No: One can have many varieties of cancer including lymphoma with a normal complete blood count (CBC) and comprehensive metabolic panel (cmp).

No: As mentioned, one can have lymphoma and have completely normal blood tests. The diagnosis of lymphoma requires a biopsy of the enlarged lymph node. There are many causes of enlarged lymph nodes, many not involving cancer. If the enlarged lymph nodes are persistent, and/or are associated with other concerning symptoms (night sweats, unexplained fevers, weight loss, problems breathing), biopsy!