Relationship anxiety / doubting my love / intrusive thoughts

hi im new here. for the last 3 months ive had these horrible reoccurring intrusive thoughts "do i love my partner" "am i happy" "how do i know if i love my partner" "are we compatible" etc. these thoughts are constant & relentless at times, they induce severe chronic anxiety, Panic attacks or a complete mental breakdown. in the last 3 months while waiting for therapy ive scoured the internet searching for answers, the only thing that comes up is ROCD, and for months i got comfort out of knowing that i may have this, however ive recently had my 1st counseling session, my therapist doesn't think i have ROCD but rather a form of relationship anxiety. there seems to be less information about doubting your own feelings / thoughts for relationship anxiety than OCD. this has freaked me out a little, now the new thoughts are "but what if these thoughts & feelings are true" "what if i REALLY am in the wrong relationship". etc.. im in a great loving relationship, my partner is amazing & its breaking my heart im having these thoughts. The sensations and physical feelings that come with the thoughts make it 10x worse, feeling disconnected, feeling empty, constantly analysing how in love i feel, feeling anxious around her all the time, the feeling that i need to pack up and run away as far as possible. these thoughts sometimes genuinely convince me that im falling out of love. these thoughts & feelings are constant from waking up till falling asleep, its exhausting & has resulted in taking time off work. but i sometimes get these gentle moments of calm in the mind & the body where i know how much i love my partner, & i know everything will be ok. ive been hesitant on going on medication as i want to get through this myself but its so difficult, i just want to go back to that time prior to that first intrusive thought coming in. but im commited to getting through this no Matter the heartache and pain. im just wondering if anyone else experiences these intrusive thoughts & feelings that doesn't have OCD? thank you