ivf pregnancy spotting/bleeding started at 3.5 weeks

hi, this is my third ivf attempt and at week 4 i was confirmed pregnant! my beta hcg levels were 72, 295, and 1272 (all 3 days apart). although a great rise in levels i'm terrified because i started spotting and cramping few days after my transfer. most days have been pinkish/brown, but now at 5 weeks, but one day this past weekend i had bright red bleeding that was more drippy and passed a small clot (but not considered heavy).

i haven't done any jarring exercise or intercourse that would have contributed to this at all. cramping in the beginning was bad so i switched from prometrium to endometrium which seemed to help ease cramping.

has anyone had this similar rise in bhcg levels and had a positive outcome? i'm going to have my 4th blood test this wednesday before my 6 week ultrasound next week. so far symptoms that recently started is strong sense of smell, tender breasts, and bloating.

thanks anyone who has some insight!