Honestly you'll get into most universities that you have the entry requirements for. I've got 3 A levels grades AAC and got into my university of choice but if I could go back and do it again I would have 100% chose BTEC to save myself the stress. Take a look on ucas at some courses you are interested in, if they are saying the accept BTECs they won't look down on them. Don't stress yourself out about things you don't need to, just focus on getting the grades.