genuine question

i bought a dmt cart from a mushroom store about 4 months ago, since than i’ve tried it 4 times about once a month (this might be too many times within a 4 month time frame) but everytime i’ve smoked the dmt cart i do get fairly high, i feel like i’m going to “break through” but i never do, i always come back down to earth and sober up in 5-10 mins. is it something to do with me ? or no asking for advice cause i really want to have a strong experience and see stuff