I am 41 yo. i had a miscarriage 5 months ago then had 3 normal periods. this mth i missed a period. random fsh is 59. can i get pregnant in the future?

Questionable: Get blood for fsh, lh, estradiol, progesterone, and then your doctor can tell you the answer about possible pregnancy.

Low egg supply: Random fsh can be higher if it's done just before ovulation, when your body has a 'surge' of lh and fsh hormones. 59 is a high value even for a random fsh, and is likely to be a sign of low egg supply or diminished ovarian reserve - lower egg numbers and quality. No test of ovarian reserve is perfect and you still have a chance of a healthy pregnancy. See a rei specialist for more detailed testing.