Gained 4lbs in 3 days

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I'm week 8 tomorrow and I have stayed the same weight so far. I read/confirmed by my doctor that in the first trimester it is okay to loose weight or gain a max of 5 lbs. I still have a month left.
On Monday morning I was 143 and by Thursday morning I was 147! I can't emotionally handle this immediate/sudden weight gain!  I already have body dismorphic disorder (bdd) issues (ongoing treatment since 13 yo, I'm now 32 yo). Anybody else suffer with this and how did you handle it through the pregnancy and weight gain.