I've suffered anxiety gad for almost 3 years now

so I’ve been with fiancee for 2 years on and of and I relized I love her and for 6 months I kept trying to get her back I finally got her back and we’ve been together 6 months in the making I asked her to marry me 1 month in cause I love her I didn’t want to lose her to my own stupidety so anyway when we were together for 3 months and a bit I left for holiday for 2 week it was the most dreadfull 2 week of my entire life so at first I couldn’t grasp for 4 days that I was in Romania not the UK well I knew but I still thought I was in the UK then I started over think what if I didn’t love her anymore what if when I came back nothing would be the same it made feel like I had no heart but I really missed her and I had 4 brake downs in 2 weeks and all those thoughts wouldn’t leave me alone I felt horrible so I begged my mum to bring us back earlier and when we came back it got worse but I came out of it after a while I was ok for like 2 weeks then I got into a fight and I was calm for the rest of the day then the next day I thought what if she was cheating on me then what I she is cheating on me with the guy I had a fight with the what if I saw her as my friend then to what If I like my ex then what if I didn’t love my fiancee anymore what if is this and that and I would wake up crying or at least cry with In the day but when I was with her I was better my heart and my stomach felt at ease but my brain will be calm for a little bit the get back to work and I thought is it cause I might be forcing my self to be with her which really upsets me cause I want be with her for the rest of my life and I don’t it to be a reallity the thought I have cause I hate them I’ve been to doctors the said it’s anxiety and intrusive thoughts and I’m anxiouse to be around my wife cause I’m afraid of the thoughts being real thank you for reading

have you spoken with her and explianed how your feeling ?

yes I did and it makes me feel better when I’m with her but it’s just all these thoughts