My bpd is making me hyper sensitive to everything my bf does and says and this usually becomes 1000x worse when im getting my period.

Weve been together for 7 months, lived together for 2. Ive noticed hes been acting weird latley so sunday i told him i feel like things have been tense between us. Honestly ive been giving myself a hard time since my hours at my job have been drastically cut because of covid. Im usually stuck at the apartment all day which, because im not distracting myself, makes my irrational thoughts even worse. 
He told me its annoyed him how i just hang around the apartment all day (meanwhile he works 12 hr days) but he knows its not my fault. He said that was good the same thing was bothering us. He told me he still loves me very much. He also told me not worrying so much about our relationship will make things better. On top of that we discussed me going back to school and doing online courses (he ended up paying for my course that night and told me he wouldnt be doing that if he didnt love me).

Yesterday was our 7 month anniversary and last night he said "lets see if we will make it to 8". It honestly made me upset. Then this morning he says goodbye to me before i go to work and is being affectionate and teasing and talking about our plans for dinner tonight. Im exhausted from overthinking everthing. Im going to my parents for the next couple weeks and im worried that while im away hes going to realise how much better things are when im not around.