Hi ee124. Welcome to the forum.

I'm not a doctor and I have no medical qualifications. 

Obviously, no one here can tell you what these lumps are, but I think we can offer some general advice.

First off, most lumps are harmless, but anything you're not sure about should be checked out by a doctor (or a dentist if in the mouth). 

A very common cause of a small lump on the neck is a swollen lymph node (sometimes called a "gland").  These are situated quite deep under the skin, and normally can't be felt.  However, their job is to fight infections and then they can swell up and you can feel them.  Sometimes they become tender or painful but not always. The skin above a swollen node usually looks quite normal - not red or inflamed.  If you don't have any other symptoms then give it a couple more weeks to settle down before seeing a doctor.  However, if it gets bigger, red or painful, or if you develop other symptoms (such as itching or drenching night sweats), or you simply get worried then see your doctor.

Over the years, I've seen my dentist a few times about various lumps inside my cheeks and on my lips and gums.  Just before Xmas I realised I had a bony lump on my gum which my dentist reassured me was something called a "tora" and is quite harmless. I think it would be best to show these lumps to your dentist and (if you haven't been for some time) get a dental checkup at the same time.  My local dentists are now working normally so I think you should be able to get an appointment.  I don't think they're anything to worry about, but your dentist is the expert.