Sorry long one but id really appreciate if you could read and maybe put my mind at ease or help...

i found 2 lumps on the side of my neck back in May (no known infection) and fast forward to July after a couple doctors trips and some bloods i was referred to Hematology (athough my bloods was fine the doctor did this as a precaution because they hadnt gone down).

The Consultant gave me 3 options - 1. Wait 6 months and go back, 2. Ultrasound, 3. CT.  i opted for a CT and a month later she rang and told me there was a small volume of lymphnodes and she wasnt concerned because they was less than 1cm and looked normal, she told me she would follow up in 12m time. i knew by now that small volume meant more than the 2 i felt because during the wait for the appointment i noticed a few more, a couple being near my collarbone which if im honest are really small and more noticably felt when im taking for some reason but i was happy with the results i was given at the time. 
 

anyway, after a couple weeks i started getting really anxious again, poking at my neck and i felt what i thought was a few more so i rang the consultant and she saw me last Monday, she sent me for an ultrasound and i had this Wednesday (19th october) and he guy who did it told me he does a lot of neck scans every day and also does CT imaging so think he was trying to tell me he knows what hes doing!

he didnt flag up any concerns told me again everything looked normal he didnt see any abnormal, told me what abnormal looks like and said mine dont look like that and sent me on my way, im waiting for my follow up with hematology now which i believe she is just gonna tell me the same thing but for some reason i still cant shake the anxiety!! Im driving myself to mad its really getting me down. 
 

i havent got any other symptoms either, bloods are still normal,  the results of my bloods was on my recent letter and everything is bang in the middle apart from 1 test (forgot which one) which the result is 6 and normal range is between 2-7.5 but im pregnant and apparently this elevates when pregnant so im not worried about that. 
 

i have always been anxious about my health, i am absolutely terrified of being diagnosed with cancer so this hasnt come on just because of the lymphnodes and now i dont know if its just my anxiety that is making me this crazy about the situation!!

am i being too anxious or do i ask for a biopsy? Or is that unnecessary?