It is possible to have a bowel obstruction without Crohn's, but it's not exactly a normal event. Something had to cause it, either a mechanical obstruction or paralysis of the intestines (ileus). Either way, I'd be wanting to know what caused it.
It would be unusual to have two bowel obstructions 8 years apart in Crohn's, but it's not beyond the bounds of possibility. People can go into spontaneous remission with any drugs. If you turn out to have a fistula, that massively increases the likelihood of Crohn's.
Incidentally, it's not a rare thing for Crohn's folks to be normal or even over weight anymore. www.ncbi.nlm.nih.gov/pubmed/23040290
But by the same token, being overweight isn't a risk factor in getting Crohn's, so don't feel bad on that front: www.ncbi.nlm.nih.gov/pubmed/23318483
Dx Crohn's in summer of 2000.
Tried and failed: 5-ASAs, Azathioprine, 6MP, Remicade, Methotrexate, Humira.
Diet didn't make any difference either.
The only med which worked was Prednisolone, so I ended up steroid-dependent.
Had surgery 2/13 - subtotal colectomy with end ileostomy. Currently on no meds and in remission. Also prone to depression and anxiety. Ask me anything >_>