I hope you are feeling somewhat better this evening. I can't speak from experience, but I did some research and discovered that yes, symptoms can come and go for months after chemo. But if you aren't feeling well and are experiencing discomfort in your chest, you may want to give your doctor a call for your own peace of mind.
Here is some information about different types of chest pain, when to call your doctor and when to call 911: http://www.nlm.nih.gov/medlineplus/ency/article/003079.htm
Please keep us posted!