Can this cause long term health problems?

I was just thinking earlier as i was a bit worried about my daughter ,since she was born shes been very sicky shes 5 1/2 months now and still sicks up quite a bit after every feed even 1-2 hours after a feed. she was started out feeding but too hungry and demanding for me to continue (im talking about 2 hour long feeds with an hour gap) so i put her on sma gold. she was ok with it for a while but started sicking up a lot, we put it down to not being full on that milk but drinking too much so we put her on sma white. that worked for about a month then the sicking started again. a health visitor told me about how sma is a very sicky milk and has been banned from our local hospital because of babies being sick from it, so we decided to put her on aptamil instead. it worked wonders, but then again she is being sick again. she is now on solids but getting the correct amount of milk. im just worried that this is going to have a long term effect on her, perhaps upsetting her stomach and causing allergies etc? i know some solids can do that but she was definately ready for them. i was suggested reflux but it hasnt been diagnosed because they say sick is normal for babies, but surely not the amount my daughter sicks. sometimes there is a lot and it completely covers me. its not projectile vomiting though, but sometimes smells strong of stomach acid. has anyone elses baby had this problem and were they ok? how did you get aorund it and did it have any effects on them when they got older? i dont want this to cause health problems for my daughter and i blame myself because now i wish id put up with the 2 hour long feeds and continued feeding. could it just be formula itself?? or maybe an allergy to something in it? any advice is really appreciated thanks.